79439878 has 48 divisors (see below), whose sum is σ = 150477264. Its totient is φ = 31234560.

The previous prime is 79439849. The next prime is 79439891. The reversal of 79439878 is 87893497.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67725 + ... + 68887.

It is an arithmetic number, because the mean of its divisors is an integer number (3134943).

Almost surely, 2^79439878 is an apocalyptic number.

79439878 is a deficient number, since it is larger than the sum of its proper divisors (71037386).

79439878 is a wasteful number, since it uses less digits than its factorization.

79439878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1230 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 55.

The square root of 79439878 is about 8912.9051380568. The cubic root of 79439878 is about 429.8789599827.

The spelling of 79439878 in words is "seventy-nine million, four hundred thirty-nine thousand, eight hundred seventy-eight".