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12750207990 = 2351332692841
BaseRepresentation
bin10111101111111100…
…01011101111110110
31012220120202200020120
423313332023233312
5202103023123430
65505105112410
7630650660022
oct136776135766
935816680216
1012750207990
115453183a83
12257a028706
131282702b90
1488d505382
154e955e610
hex2f7f8bbf6

12750207990 has 32 divisors (see below), whose sum is σ = 32954384736. Its totient is φ = 3138512640.

The previous prime is 12750207989. The next prime is 12750208013. The reversal of 12750207990 is 9970205721.

It is a super-3 number, since 3×127502079903 (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16346031 + ... + 16346810.

It is an arithmetic number, because the mean of its divisors is an integer number (1029824523).

Almost surely, 212750207990 is an apocalyptic number.

12750207990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12750207990 is an abundant number, since it is smaller than the sum of its proper divisors (20204176746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12750207990 is a wasteful number, since it uses less digits than its factorization.

12750207990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32692864.

The product of its (nonzero) digits is 79380, while the sum is 42.

The spelling of 12750207990 in words is "twelve billion, seven hundred fifty million, two hundred seven thousand, nine hundred ninety".

Divisors: 1 2 3 5 6 10 13 15 26 30 39 65 78 130 195 390 32692841 65385682 98078523 163464205 196157046 326928410 425006933 490392615 850013866 980785230 1275020799 2125034665 2550041598 4250069330 6375103995 12750207990