28025359488 has 144 divisors (see below), whose sum is σ = 93812756310. Its totient is φ = 8007229440.

The previous prime is 28025359399. The next prime is 28025359511. The reversal of 28025359488 is 88495352082.

It is a happy number.

28025359488 is a `hidden beast` number, since 28 + 0 + 2 + 535 + 9 + 4 + 88 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18563517504 + 9461841984 = 136248^2 + 97272^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 191793 + ... + 304688.

Almost surely, 2^28025359488 is an apocalyptic number.

28025359488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28025359488 is an abundant number, since it is smaller than the sum of its proper divisors (65787396822).

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

28025359488 is a wasteful number, since it uses less digits than its factorization.

28025359488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496515 (or 496493 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 28025359488 in words is "twenty-eight billion, twenty-five million, three hundred fifty-nine thousand, four hundred eighty-eight".