12690905328 has 60 divisors (see below), whose sum is σ = 35868602328. Its totient is φ = 4188412800.

The previous prime is 12690905327. The next prime is 12690905329. The reversal of 12690905328 is 82350909621.

12690905328 is a `hidden beast` number, since 1 + 26 + 9 + 0 + 90 + 532 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (12690905327) and next prime (12690905329).

It is a super-2 number, since 2×12690905328² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690905327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421750 + ... + 450837.

Almost surely, 2^12690905328 is an apocalyptic number.

12690905328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12690905328 is an abundant number, since it is smaller than the sum of its proper divisors (23177697000).

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

12690905328 is a wasteful number, since it uses less digits than its factorization.

12690905328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872702 (or 872693 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 12690905328 in words is "twelve billion, six hundred ninety million, nine hundred five thousand, three hundred twenty-eight".