878455728 has 60 divisors (see below), whose sum is σ = 2587856440. Its totient is φ = 277406208.

The previous prime is 878455717. The next prime is 878455741. The reversal of 878455728 is 827554878.

878455728 is a `hidden beast` number, since 8 + 7 + 84 + 557 + 2 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157801 + ... + 163272.

Almost surely, 2^878455728 is an apocalyptic number.

It is an amenable number.

878455728 is an abundant number, since it is smaller than the sum of its proper divisors (1709400712).

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

878455728 is a wasteful number, since it uses less digits than its factorization.

878455728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321106 (or 321097 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 54.

The square root of 878455728 is about 29638.7538199567. The cubic root of 878455728 is about 957.7230935371.

The spelling of 878455728 in words is "eight hundred seventy-eight million, four hundred fifty-five thousand, seven hundred twenty-eight".