79900080 has 80 divisors (see below), whose sum is σ = 266753760. Its totient is φ = 19666944.

The previous prime is 79900069. The next prime is 79900081. The reversal of 79900080 is 8000997.

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

It is not an unprimeable number, because it can be changed into a prime (79900081) 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, 9685 + ... + 15924.

It is an arithmetic number, because the mean of its divisors is an integer number (3334422).

Almost surely, 2^79900080 is an apocalyptic number.

It is an amenable number.

79900080 is an abundant number, since it is smaller than the sum of its proper divisors (186853680).

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

79900080 is a wasteful number, since it uses less digits than its factorization.

79900080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25638 (or 25632 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 79900080 is about 8938.6844669672. The cubic root of 79900080 is about 430.7074706722.

The spelling of 79900080 in words is "seventy-nine million, nine hundred thousand, eighty".