115555990 has 16 divisors (see below), whose sum is σ = 226910160. Its totient is φ = 42020320.

The previous prime is 115555969. The next prime is 115555991. The reversal of 115555990 is 99555511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115555991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525145 + ... + 525364.

It is an arithmetic number, because the mean of its divisors is an integer number (14181885).

Almost surely, 2^115555990 is an apocalyptic number.

115555990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115555990 is a deficient number, since it is larger than the sum of its proper divisors (111354170).

115555990 is a wasteful number, since it uses less digits than its factorization.

115555990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050527.

The product of its (nonzero) digits is 50625, while the sum is 40.

The square root of 115555990 is about 10749.6972050379. The cubic root of 115555990 is about 487.0768486765.

The spelling of 115555990 in words is "one hundred fifteen million, five hundred fifty-five thousand, nine hundred ninety".