79424820 has 48 divisors (see below), whose sum is σ = 247101120. Its totient is φ = 21179808.

The previous prime is 79424777. The next prime is 79424837. The reversal of 79424820 is 2842497.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73002 + ... + 74081.

It is an arithmetic number, because the mean of its divisors is an integer number (5147940).

Almost surely, 2^79424820 is an apocalyptic number.

It is an amenable number.

79424820 is an abundant number, since it is smaller than the sum of its proper divisors (167676300).

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

79424820 is a wasteful number, since it uses less digits than its factorization.

79424820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147101 (or 147093 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 79424820 is about 8912.0603678386. The cubic root of 79424820 is about 429.8517967720.

The spelling of 79424820 in words is "seventy-nine million, four hundred twenty-four thousand, eight hundred twenty".