115684640 has 24 divisors (see below), whose sum is σ = 273305340. Its totient is φ = 46273792.

The previous prime is 115684627. The next prime is 115684651. The reversal of 115684640 is 46486511.

It can be written as a sum of positive squares in 2 ways, for example, as 105925264 + 9759376 = 10292^2 + 3124^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 115684640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361355 + ... + 361674.

Almost surely, 2^115684640 is an apocalyptic number.

115684640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115684640 is an abundant number, since it is smaller than the sum of its proper divisors (157620700).

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

115684640 is an equidigital number, since it uses as much as digits as its factorization.

115684640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723044 (or 723036 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 115684640 is about 10755.6794299570. The cubic root of 115684640 is about 487.2575379875.

The spelling of 115684640 in words is "one hundred fifteen million, six hundred eighty-four thousand, six hundred forty".