79190090 has 32 divisors (see below), whose sum is σ = 166700160. Its totient is φ = 26518464.

The previous prime is 79190057. The next prime is 79190093. The reversal of 79190090 is 9009197.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 79190090.

It is not an unprimeable number, because it can be changed into a prime (79190093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10145 + ... + 16164.

It is an arithmetic number, because the mean of its divisors is an integer number (5209380).

Almost surely, 2^79190090 is an apocalyptic number.

79190090 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

79190090 is an abundant number, since it is smaller than the sum of its proper divisors (87510070).

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

79190090 is a wasteful number, since it uses less digits than its factorization.

79190090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26366.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 79190090 is about 8898.8813903771. The cubic root of 79190090 is about 429.4279214059.

The spelling of 79190090 in words is "seventy-nine million, one hundred ninety thousand, ninety".