79159920 has 80 divisors (see below), whose sum is σ = 280458240. Its totient is φ = 18093312.

The previous prime is 79159901. The next prime is 79159921. The reversal of 79159920 is 2995197.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79159921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21880 + ... + 25239.

It is an arithmetic number, because the mean of its divisors is an integer number (3505728).

Almost surely, 2^79159920 is an apocalyptic number.

79159920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79159920 is an abundant number, since it is smaller than the sum of its proper divisors (201298320).

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

79159920 is a wasteful number, since it uses less digits than its factorization.

79159920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47142 (or 47136 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 79159920 is about 8897.1860720118. The cubic root of 79159920 is about 429.3733797074.

The spelling of 79159920 in words is "seventy-nine million, one hundred fifty-nine thousand, nine hundred twenty".