115579990 has 32 divisors (see below), whose sum is σ = 212357376. Its totient is φ = 45283680.

The previous prime is 115579987. The next prime is 115579999. The reversal of 115579990 is 99975511.

It is a self number, because there is not a number n which added to its sum of digits gives 115579990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115579999) 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, 108199 + ... + 109261.

It is an arithmetic number, because the mean of its divisors is an integer number (6636168).

Almost surely, 2^115579990 is an apocalyptic number.

115579990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115579990 is a deficient number, since it is larger than the sum of its proper divisors (96777386).

115579990 is a wasteful number, since it uses less digits than its factorization.

115579990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284.

The product of its (nonzero) digits is 127575, while the sum is 46.

The square root of 115579990 is about 10750.8134575947. The cubic root of 115579990 is about 487.1105669204.

The spelling of 115579990 in words is "one hundred fifteen million, five hundred seventy-nine thousand, nine hundred ninety".