115525440 has 140 divisors (see below), whose sum is σ = 411036516. Its totient is φ = 30799872.

The previous prime is 115525393. The next prime is 115525441. The reversal of 115525440 is 44525511.

115525440 is a `hidden beast` number, since 115 + 5 + 2 + 544 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61591104 + 53934336 = 7848^2 + 7344^2 .

It is a super-2 number, since 2×115525440² = 26692254574387200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115525441) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23692 + ... + 28148.

Almost surely, 2^115525440 is an apocalyptic number.

115525440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115525440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205518258).

115525440 is an abundant number, since it is smaller than the sum of its proper divisors (295511076).

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

115525440 is an equidigital number, since it uses as much as digits as its factorization.

115525440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486 (or 4467 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 115525440 is about 10748.2761408516. The cubic root of 115525440 is about 487.0339214074.

The spelling of 115525440 in words is "one hundred fifteen million, five hundred twenty-five thousand, four hundred forty".