115408640 has 36 divisors (see below), whose sum is σ = 276442824. Its totient is φ = 46162944.

The previous prime is 115408637. The next prime is 115408649. The reversal of 115408640 is 46804511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115408649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43802 + ... + 46361.

Almost surely, 2^115408640 is an apocalyptic number.

115408640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115408640 is an abundant number, since it is smaller than the sum of its proper divisors (161034184).

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

115408640 is an frugal number, since it uses more digits than its factorization.

115408640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90184 (or 90170 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 115408640 is about 10742.8413373744. The cubic root of 115408640 is about 486.8697303171.

The spelling of 115408640 in words is "one hundred fifteen million, four hundred eight thousand, six hundred forty".