79939080 has 384 divisors, whose sum is σ = 314496000. Its totient is φ = 17418240.

The previous prime is 79939063. The next prime is 79939087. The reversal of 79939080 is 8093997.

It is a happy number.

It is a super-2 number, since 2×79939080² = 12780513022492800, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (79939087) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2578665 + ... + 2578695.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^79939080 is an apocalyptic number.

79939080 is the 5655-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79939080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157248000).

79939080 is an abundant number, since it is smaller than the sum of its proper divisors (234556920).

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

79939080 is a wasteful number, since it uses less digits than its factorization.

79939080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 79939080 is about 8940.8657298944. The cubic root of 79939080 is about 430.7775367642. Note that the first 3 decimals are identical.

The spelling of 79939080 in words is "seventy-nine million, nine hundred thirty-nine thousand, eighty".