12920567928 has 32 divisors (see below), whose sum is σ = 32306139600. Its totient is φ = 4306226688.

The previous prime is 12920567857. The next prime is 12920567951. The reversal of 12920567928 is 82976502921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146208 + ... + 217296.

Almost surely, 2^12920567928 is an apocalyptic number.

It is an amenable number.

12920567928 is an abundant number, since it is smaller than the sum of its proper divisors (19385571672).

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

12920567928 is a wasteful number, since it uses less digits than its factorization.

12920567928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78671 (or 78667 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 12920567928 in words is "twelve billion, nine hundred twenty million, five hundred sixty-seven thousand, nine hundred twenty-eight".