79870290 has 32 divisors (see below), whose sum is σ = 191963520. Its totient is φ = 21268224.

The previous prime is 79870277. The next prime is 79870327. The reversal of 79870290 is 9207897.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26122 + ... + 29018.

It is an arithmetic number, because the mean of its divisors is an integer number (5998860).

Almost surely, 2^79870290 is an apocalyptic number.

79870290 is an abundant number, since it is smaller than the sum of its proper divisors (112093230).

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

79870290 is a wasteful number, since it uses less digits than its factorization.

79870290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 79870290 is about 8937.0179590286. The cubic root of 79870290 is about 430.6539355965.

The spelling of 79870290 in words is "seventy-nine million, eight hundred seventy thousand, two hundred ninety".