879404978 has 4 divisors (see below), whose sum is σ = 1319107470. Its totient is φ = 439702488.

The previous prime is 879404969. The next prime is 879404989.

879404978 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 655513609 + 223891369 = 25603^2 + 14963^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219851243 + ... + 219851246.

Almost surely, 2^879404978 is an apocalyptic number.

879404978 is a deficient number, since it is larger than the sum of its proper divisors (439702492).

879404978 is a wasteful number, since it uses less digits than its factorization.

879404978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439702491.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The square root of 879404978 is about 29654.7631587238. The cubic root of 879404978 is about 958.0679378484.

The spelling of 879404978 in words is "eight hundred seventy-nine million, four hundred four thousand, nine hundred seventy-eight".