115120990 has 16 divisors (see below), whose sum is σ = 207409248. Its totient is φ = 46005856.

The previous prime is 115120987. The next prime is 115120997. The reversal of 115120990 is 99021511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115120997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7524 + ... + 16936.

It is an arithmetic number, because the mean of its divisors is an integer number (12963078).

Almost surely, 2^115120990 is an apocalyptic number.

115120990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115120990 is a deficient number, since it is larger than the sum of its proper divisors (92288258).

115120990 is a wasteful number, since it uses less digits than its factorization.

115120990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10643.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 115120990 is about 10729.4449996260. Note that the first 3 decimals coincide. The cubic root of 115120990 is about 486.4648946726.

The spelling of 115120990 in words is "one hundred fifteen million, one hundred twenty thousand, nine hundred ninety".