28131304256 has 28 divisors (see below), whose sum is σ = 60897881760. Its totient is φ = 12786956160.

The previous prime is 28131304249. The next prime is 28131304273. The reversal of 28131304256 is 65240313182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19978916 + ... + 19980323.

Almost surely, 2^28131304256 is an apocalyptic number.

It is an amenable number.

28131304256 is an abundant number, since it is smaller than the sum of its proper divisors (32766577504).

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

28131304256 is a wasteful number, since it uses less digits than its factorization.

28131304256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39959262 (or 39959252 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 28131304256 in words is "twenty-eight billion, one hundred thirty-one million, three hundred four thousand, two hundred fifty-six".