28776512844 has 48 divisors (see below), whose sum is σ = 74805894240. Its totient is φ = 9566441280.

The previous prime is 28776512837. The next prime is 28776512881. The reversal of 28776512844 is 44821567782.

28776512844 is a `hidden beast` number, since 2 + 87 + 7 + 6 + 512 + 8 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316887 + ... + 397454.

It is an arithmetic number, because the mean of its divisors is an integer number (1558456130).

Almost surely, 2^28776512844 is an apocalyptic number.

It is an amenable number.

28776512844 is an abundant number, since it is smaller than the sum of its proper divisors (46029381396).

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

28776512844 is a wasteful number, since it uses less digits than its factorization.

28776512844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714727 (or 714719 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

The spelling of 28776512844 in words is "twenty-eight billion, seven hundred seventy-six million, five hundred twelve thousand, eight hundred forty-four".