28870257772 has 12 divisors (see below), whose sum is σ = 50624203000. Its totient is φ = 14406199776.

The previous prime is 28870257737. The next prime is 28870257781. The reversal of 28870257772 is 27775207882.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7230033 + ... + 7234024.

Almost surely, 2^28870257772 is an apocalyptic number.

It is an amenable number.

28870257772 is a deficient number, since it is larger than the sum of its proper divisors (21753945228).

28870257772 is a wasteful number, since it uses less digits than its factorization.

28870257772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14464560 (or 14464558 counting only the distinct ones).

The product of its (nonzero) digits is 6146560, while the sum is 55.

The spelling of 28870257772 in words is "twenty-eight billion, eight hundred seventy million, two hundred fifty-seven thousand, seven hundred seventy-two".