115215490 has 32 divisors (see below), whose sum is σ = 228545856. Its totient is φ = 41549760.

The previous prime is 115215479. The next prime is 115215497. The reversal of 115215490 is 94512511.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (115215497) 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, 4716 + ... + 15895.

It is an arithmetic number, because the mean of its divisors is an integer number (7142058).

Almost surely, 2^115215490 is an apocalyptic number.

115215490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115215490 is a deficient number, since it is larger than the sum of its proper divisors (113330366).

115215490 is a wasteful number, since it uses less digits than its factorization.

115215490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20674.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 115215490 is about 10733.8478655140. The cubic root of 115215490 is about 486.5979673048.

The spelling of 115215490 in words is "one hundred fifteen million, two hundred fifteen thousand, four hundred ninety".