28551533976 has 48 divisors (see below), whose sum is σ = 88373797200. Its totient is φ = 8157580992.

The previous prime is 28551533963. The next prime is 28551533987. The reversal of 28551533976 is 67933515582.

28551533976 is a `hidden beast` number, since 2 + 8 + 5 + 515 + 33 + 97 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28324431 + ... + 28325438.

It is an arithmetic number, because the mean of its divisors is an integer number (1841120775).

Almost surely, 2^28551533976 is an apocalyptic number.

It is an amenable number.

28551533976 is an abundant number, since it is smaller than the sum of its proper divisors (59822263224).

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

28551533976 is a wasteful number, since it uses less digits than its factorization.

28551533976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56649888 (or 56649881 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 54.

The spelling of 28551533976 in words is "twenty-eight billion, five hundred fifty-one million, five hundred thirty-three thousand, nine hundred seventy-six".