115638520 has 32 divisors (see below), whose sum is σ = 260521920. Its totient is φ = 46195840.

The previous prime is 115638499. The next prime is 115638521. The reversal of 115638520 is 25836511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115638521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42810 + ... + 45430.

It is an arithmetic number, because the mean of its divisors is an integer number (8141310).

Almost surely, 2^115638520 is an apocalyptic number.

115638520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115638520 is an abundant number, since it is smaller than the sum of its proper divisors (144883400).

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

115638520 is a wasteful number, since it uses less digits than its factorization.

115638520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735 (or 3731 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 115638520 is about 10753.5352326572. The cubic root of 115638520 is about 487.1927777201.

The spelling of 115638520 in words is "one hundred fifteen million, six hundred thirty-eight thousand, five hundred twenty".