# 10,000,000

(Redirected from 1 E7)
10000000
CardinalTen million
Ordinal10000000th
(ten millionth)
Factorization27 · 57
Greek numeral${\stackrel {\alpha }{\mathrm {M} }}$ Roman numeralX
Greek prefixhebdo-
Binary1001100010010110100000002
Ternary2002110011021013
Octal461132008
Duodecimal342305412

10,000,000 (ten million) is the natural number following 9,999,999 and preceding 10,000,001.

In scientific notation, it is written as 107.

In South Asia, it is known as the crore.

In Cyrillic numerals, it is known as the vran (вран - raven).

## Selected 8-digit numbers (10,000,001–99,999,999)

### 10,000,001 to 19,999,999

• 10,000,019 – smallest 8-digit prime number
• 10,001,628 – smallest triangular number with 8 digits and the 4,472nd triangular number
• 10,077,696 = 69
• 10,609,137Leyland number
• 11,111,111repunit
• 11,390,625 = 156
• 11,436,171Keith number
• 11,485,154Markov number
• 11,881,376 = 265
• 12,252,240 – highly composite number, smallest number divisible by all the numbers 1 through 18
• 12,890,625 – 1-automorphic number
• 12,960,000 = 604, (3·4·5)4, Plato's "nuptial number" (Republic VIII; see regular number)
• 12,648,430 – hexadecimal C0FFEE, resembling the word "coffee"; used as a placeholder in computer programming, see hexspeak.
• 12,988,816 – number of different ways of covering an 8-by-8 square with 32 1-by-2 dominoes
• 13,782,649 – Markov number
• 14,348,907 = 315
• 14,352,282 – Leyland number
• 14,930,352Fibonacci number
• 15,485,863 – 1,000,000th prime number
• 15,994,428Pell number
• 16,609,837 – Markov number
• 16,769,023Carol prime and an emirp
• 16,777,216 = 224hexadecimal "million" (0x1000000), number of possible colors in 24/32-bit Truecolor computer graphics
• 16,777,792 – Leyland number
• 16,785,407Kynea number
• 16,797,952 – Leyland number
• 16,964,653 – Markov number
• 17,016,602 – index of a prime Woodall number
• 17,210,368 = 285
• 17,650,828 = 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88
• 18,199,284Motzkin number
• 19,487,171 = 117
• 19,680,277Wedderburn-Etherington number
• 19,987,816 – palindromic in 3 consecutive bases: 41AAA1413, 292429214, 1B4C4B115

### 40,000,000 to 49,999,999

• 40,353,607 = 79
• 43,046,721 = 316
• 43,050,817 – Leyland number
• 43,112,609Mersenne prime exponent
• 43,443,858 – palindromic in 3 consecutive bases: 3C323C315, 296E69216, 1DA2AD117
• 43,484,701 – Markov number
• 44,121,607 – Keith number
• 44,444,444 – repdigit
• 45,136,576 – Leyland number
• 45,435,424 = 345
• 46,026,618 – Wedderburn-Etherington number
• 46,656,000 = 3603
• 47,045,881 = 196
• 48,828,125 = 511
• 48,928,105 – Markov number
• 48,989,176 – Leyland number

### 50,000,000 to 59,999,999

• 50,852,019 – Motzkin number
• 52,521,875 = 355
• 55,555,555 – repdigit

### 60,000,000 to 69,999,999

• 60,466,176 – 610
• 61,466,176 – Leyland number
• 62,748,517 = 137
• 63,245,986 – Fibonacci number, Markov number
• 64,000,000 = 206vigesimal "million" (1 alau in Mayan, 1 poaltzonxiquipilli in Nahuatl)
• 66,600,049 - Largest minimal prime in base 10
• 66,666,666 – repdigit
• 67,092,479 – Carol number
• 67,108,864 = 226
• 67,109,540 – Leyland number
• 67,125,247 – Kynea number
• 67,137,425 – Leyland number
• 69,343,957 = 375

### 70,000,000 to 79,999,999

• 72,546,283 – the smallest prime number preceded and followed by prime gaps of over 100
• 73,939,133 – the largest prime number that can be 'tailed' again and again by removing its last digit to produce only primes
• 74,207,281Mersenne prime exponent
• 77,777,777 – repdigit
• 78,442,645 – Markov number
• 79,235,168 = 385

### 90,000,000 to 99,999,999

• 90,224,199 = 395
• 93,222,358 – Pell number
• 94,418,953 – Markov number
• 99,991,011 – largest triangular number with 8 digits and the 14,141st triangular number
• 99,999,989 – greatest prime number with 8 digits
• 99,999,999 – repdigit, Friedman number, believed to be smallest number to be both repdigit and Friedman