115522440 has 64 divisors (see below), whose sum is σ = 378077760. Its totient is φ = 28005120.

The previous prime is 115522423. The next prime is 115522447. The reversal of 115522440 is 44225511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 115522440.

It is not an unprimeable number, because it can be changed into a prime (115522447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42439 + ... + 45078.

It is an arithmetic number, because the mean of its divisors is an integer number (5907465).

Almost surely, 2^115522440 is an apocalyptic number.

115522440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115522440 is an abundant number, since it is smaller than the sum of its proper divisors (262555320).

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

115522440 is a wasteful number, since it uses less digits than its factorization.

115522440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87542 (or 87538 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 115522440 is about 10748.1365826826. The cubic root of 115522440 is about 487.0297055556.

Adding to 115522440 its reverse (44225511), we get a palindrome (159747951).

The spelling of 115522440 in words is "one hundred fifteen million, five hundred twenty-two thousand, four hundred forty".