115440840 has 48 divisors (see below), whose sum is σ = 375183900. Its totient is φ = 30784128.

The previous prime is 115440839. The next prime is 115440877. The reversal of 115440840 is 48044511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 108118404 + 7322436 = 10398^2 + 2706^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159975 + ... + 160694.

Almost surely, 2^115440840 is an apocalyptic number.

115440840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115440840 is an abundant number, since it is smaller than the sum of its proper divisors (259743060).

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

115440840 is a wasteful number, since it uses less digits than its factorization.

115440840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320686 (or 320679 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 115440840 is about 10744.3399052711. The cubic root of 115440840 is about 486.9150063829.

The spelling of 115440840 in words is "one hundred fifteen million, four hundred forty thousand, eight hundred forty".