28056776808 has 16 divisors (see below), whose sum is σ = 70141942080. Its totient is φ = 9352258928.

The previous prime is 28056776807. The next prime is 28056776833. The reversal of 28056776808 is 80867765082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28056776807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584516160 + ... + 584516207.

It is an arithmetic number, because the mean of its divisors is an integer number (4383871380).

Almost surely, 2^28056776808 is an apocalyptic number.

It is an amenable number.

28056776808 is an abundant number, since it is smaller than the sum of its proper divisors (42085165272).

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

28056776808 is a wasteful number, since it uses less digits than its factorization.

28056776808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169032376 (or 1169032372 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 57.

The spelling of 28056776808 in words is "twenty-eight billion, fifty-six million, seven hundred seventy-six thousand, eight hundred eight".