28402556812 has 48 divisors (see below), whose sum is σ = 61166085120. Its totient is φ = 11262304512.

The previous prime is 28402556803. The next prime is 28402556867. The reversal of 28402556812 is 21865520482.

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, 477588 + ... + 533755.

It is an arithmetic number, because the mean of its divisors is an integer number (1274293440).

Almost surely, 2^28402556812 is an apocalyptic number.

It is an amenable number.

28402556812 is an abundant number, since it is smaller than the sum of its proper divisors (32763528308).

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

28402556812 is a wasteful number, since it uses less digits than its factorization.

28402556812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011430 (or 1011428 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 43.

The spelling of 28402556812 in words is "twenty-eight billion, four hundred two million, five hundred fifty-six thousand, eight hundred twelve".