115155440 has 20 divisors (see below), whose sum is σ = 267736584. Its totient is φ = 46062144.

The previous prime is 115155437. The next prime is 115155449. The reversal of 115155440 is 44551511.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115155449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719642 + ... + 719801.

Almost surely, 2^115155440 is an apocalyptic number.

115155440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115155440 is an abundant number, since it is smaller than the sum of its proper divisors (152581144).

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

115155440 is a wasteful number, since it uses less digits than its factorization.

115155440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439456 (or 1439450 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 115155440 is about 10731.0502747867. The cubic root of 115155440 is about 486.5134147679.

The spelling of 115155440 in words is "one hundred fifteen million, one hundred fifty-five thousand, four hundred forty".