878809928 has 8 divisors (see below), whose sum is σ = 1647768630. Its totient is φ = 439404960.

The previous prime is 878809913. The next prime is 878809933. The reversal of 878809928 is 829908878.

It can be written as a sum of positive squares in only one way, i.e., 629106724 + 249703204 = 25082^2 + 15802^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54925613 + ... + 54925628.

Almost surely, 2^878809928 is an apocalyptic number.

It is an amenable number.

878809928 is a deficient number, since it is larger than the sum of its proper divisors (768958702).

878809928 is a wasteful number, since it uses less digits than its factorization.

878809928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109851247 (or 109851243 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 59.

The square root of 878809928 is about 29644.7285027203. The cubic root of 878809928 is about 957.8517966413.

The spelling of 878809928 in words is "eight hundred seventy-eight million, eight hundred nine thousand, nine hundred twenty-eight".