79109720 has 16 divisors (see below), whose sum is σ = 177996960. Its totient is φ = 31643872.

The previous prime is 79109699. The next prime is 79109743. The reversal of 79109720 is 2790197.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988832 + ... + 988911.

It is an arithmetic number, because the mean of its divisors is an integer number (11124810).

Almost surely, 2^79109720 is an apocalyptic number.

It is an amenable number.

79109720 is an abundant number, since it is smaller than the sum of its proper divisors (98887240).

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

79109720 is a wasteful number, since it uses less digits than its factorization.

79109720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977754 (or 1977750 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 79109720 is about 8894.3645079342. The cubic root of 79109720 is about 429.2825968061.

The spelling of 79109720 in words is "seventy-nine million, one hundred nine thousand, seven hundred twenty".