115715440 has 40 divisors (see below), whose sum is σ = 270482688. Its totient is φ = 46037760.

The previous prime is 115715401. The next prime is 115715449. The reversal of 115715440 is 44517511.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 115715399 and 115715408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115715449) 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, 11494 + ... + 19066.

Almost surely, 2^115715440 is an apocalyptic number.

115715440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115715440 is an abundant number, since it is smaller than the sum of its proper divisors (154767248).

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

115715440 is a wasteful number, since it uses less digits than its factorization.

115715440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777 (or 7771 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 115715440 is about 10757.1111363600. Note that the first 4 decimals coincide. The cubic root of 115715440 is about 487.3007768033.

The spelling of 115715440 in words is "one hundred fifteen million, seven hundred fifteen thousand, four hundred forty".