115638530 has 24 divisors (see below), whose sum is σ = 242133948. Its totient is φ = 39647328.

The previous prime is 115638529. The next prime is 115638559. The reversal of 115638530 is 35836511.

It can be written as a sum of positive squares in 2 ways, for example, as 93180409 + 22458121 = 9653^2 + 4739^2 .

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, 117509 + ... + 118488.

Almost surely, 2^115638530 is an apocalyptic number.

115638530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115638530 is an abundant number, since it is smaller than the sum of its proper divisors (126495418).

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

115638530 is a wasteful number, since it uses less digits than its factorization.

115638530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236018 (or 236011 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 115638530 is about 10753.5356976206. The cubic root of 115638530 is about 487.1927917637.

The spelling of 115638530 in words is "one hundred fifteen million, six hundred thirty-eight thousand, five hundred thirty".