79439670 has 64 divisors (see below), whose sum is σ = 218695680. Its totient is φ = 20498400.

The previous prime is 79439653. The next prime is 79439681. The reversal of 79439670 is 7693497.

It is a super-2 number, since 2×79439670² = 12621322339417800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3625 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (3417120).

Almost surely, 2^79439670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79439670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109347840).

79439670 is an abundant number, since it is smaller than the sum of its proper divisors (139256010).

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

79439670 is a wasteful number, since it uses less digits than its factorization.

79439670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9538 (or 9532 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 79439670 is about 8912.8934695754. The cubic root of 79439670 is about 429.8785847937.

The spelling of 79439670 in words is "seventy-nine million, four hundred thirty-nine thousand, six hundred seventy".