79442478 has 32 divisors (see below), whose sum is σ = 181314720. Its totient is φ = 25764480.

The previous prime is 79442443. The next prime is 79442501. The reversal of 79442478 is 87424497.

It is a super-2 number, since 2×79442478² = 12622214621560968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17883 + ... + 21878.

It is an arithmetic number, because the mean of its divisors is an integer number (5666085).

Almost surely, 2^79442478 is an apocalyptic number.

79442478 is an abundant number, since it is smaller than the sum of its proper divisors (101872242).

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

79442478 is a wasteful number, since it uses less digits than its factorization.

79442478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39809 (or 39803 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 79442478 is about 8913.0509927858. The cubic root of 79442478 is about 429.8836497897.

The spelling of 79442478 in words is "seventy-nine million, four hundred forty-two thousand, four hundred seventy-eight".