115557372 has 72 divisors (see below), whose sum is σ = 336336000. Its totient is φ = 32768928.

The previous prime is 115557371. The next prime is 115557389. The reversal of 115557372 is 273755511.

It is a happy number.

115557372 is a `hidden beast` number, since 1 + 15 + 5 + 573 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115557371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33379 + ... + 36677.

Almost surely, 2^115557372 is an apocalyptic number.

115557372 is a gapful number since it is divisible by the number (12) 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 115557372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168168000).

115557372 is an abundant number, since it is smaller than the sum of its proper divisors (220778628).

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

115557372 is a wasteful number, since it uses less digits than its factorization.

115557372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455 (or 3450 counting only the distinct ones).

The product of its digits is 36750, while the sum is 36.

The square root of 115557372 is about 10749.7614857261. The cubic root of 115557372 is about 487.0787904121.

The spelling of 115557372 in words is "one hundred fifteen million, five hundred fifty-seven thousand, three hundred seventy-two".