115660640 has 48 divisors (see below), whose sum is σ = 273892752. Its totient is φ = 46155264.

The previous prime is 115660637. The next prime is 115660667. The reversal of 115660640 is 46066511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127067 + ... + 127973.

It is an arithmetic number, because the mean of its divisors is an integer number (5706099).

Almost surely, 2^115660640 is an apocalyptic number.

115660640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115660640 is an abundant number, since it is smaller than the sum of its proper divisors (158232112).

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

115660640 is an equidigital number, since it uses as much as digits as its factorization.

115660640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 115660640 is about 10754.5636824559. The cubic root of 115660640 is about 487.2238400835.

The spelling of 115660640 in words is "one hundred fifteen million, six hundred sixty thousand, six hundred forty".