28057497777912 has 32 divisors (see below), whose sum is σ = 70144060931280. Its totient is φ = 9352457061120.

The previous prime is 28057497777899. The next prime is 28057497777943. The reversal of 28057497777912 is 21977779475082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3042228 + ... + 8085180.

Almost surely, 2^{28057497777912} is an apocalyptic number.

It is an amenable number.

28057497777912 is an abundant number, since it is smaller than the sum of its proper divisors (42086563153368).

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

28057497777912 is a wasteful number, since it uses less digits than its factorization.

28057497777912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274783 (or 5274779 counting only the distinct ones).

The product of its (nonzero) digits is 871274880, while the sum is 75.

The spelling of 28057497777912 in words is "twenty-eight trillion, fifty-seven billion, four hundred ninety-seven million, seven hundred seventy-seven thousand, nine hundred twelve".