79180020 has 72 divisors (see below), whose sum is σ = 246060360. Its totient is φ = 20597760.

The previous prime is 79180019. The next prime is 79180081. The reversal of 79180020 is 2008197.

It can be written as a sum of positive squares in 4 ways, for example, as 2232036 + 76947984 = 1494^2 + 8772^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2016 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (3417505).

Almost surely, 2^79180020 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 79180020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123030180).

79180020 is an abundant number, since it is smaller than the sum of its proper divisors (166880340).

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

79180020 is a wasteful number, since it uses less digits than its factorization.

79180020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10785 (or 10780 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 79180020 is about 8898.3155709381. The cubic root of 79180020 is about 429.4097182761.

The spelling of 79180020 in words is "seventy-nine million, one hundred eighty thousand, twenty".