79009020 has 84 divisors (see below), whose sum is σ = 248810520. Its totient is φ = 21065184.

The previous prime is 79008983. The next prime is 79009031. The reversal of 79009020 is 2090097.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 11871 + ... + 17289.

It is an arithmetic number, because the mean of its divisors is an integer number (2962030).

Almost surely, 2^79009020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79009020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124405260).

79009020 is an abundant number, since it is smaller than the sum of its proper divisors (169801500).

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

79009020 is a wasteful number, since it uses less digits than its factorization.

79009020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5446 (or 5429 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 79009020 is about 8888.7018174759. The cubic root of 79009020 is about 429.1003726215.

The spelling of 79009020 in words is "seventy-nine million, nine thousand, twenty".