115638380 has 48 divisors (see below), whose sum is σ = 285302304. Its totient is φ = 38814720.

The previous prime is 115638373. The next prime is 115638433. The reversal of 115638380 is 83836511.

It is a self number, because there is not a number n which added to its sum of digits gives 115638380.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17357 + ... + 23076.

It is an arithmetic number, because the mean of its divisors is an integer number (5943798).

Almost surely, 2^115638380 is an apocalyptic number.

115638380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115638380 is an abundant number, since it is smaller than the sum of its proper divisors (169663924).

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

115638380 is a wasteful number, since it uses less digits than its factorization.

115638380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40466 (or 40464 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 115638380 is about 10753.5287231680. The cubic root of 115638380 is about 487.1925811103.

The spelling of 115638380 in words is "one hundred fifteen million, six hundred thirty-eight thousand, three hundred eighty".