28057760772 has 24 divisors (see below), whose sum is σ = 69319174176. Its totient is φ = 8802434688.

The previous prime is 28057760669. The next prime is 28057760821. The reversal of 28057760772 is 27706775082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 68768818 + ... + 68769225.

It is an arithmetic number, because the mean of its divisors is an integer number (2888298924).

Almost surely, 2^28057760772 is an apocalyptic number.

It is an amenable number.

28057760772 is an abundant number, since it is smaller than the sum of its proper divisors (41261413404).

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

28057760772 is a wasteful number, since it uses less digits than its factorization.

28057760772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137538067 (or 137538065 counting only the distinct ones).

The product of its (nonzero) digits is 2304960, while the sum is 51.

The spelling of 28057760772 in words is "twenty-eight billion, fifty-seven million, seven hundred sixty thousand, seven hundred seventy-two".