115609980 has 24 divisors (see below), whose sum is σ = 323708112. Its totient is φ = 30829312.

The previous prime is 115609951. The next prime is 115609987. The reversal of 115609980 is 89906511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115609987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963357 + ... + 963476.

It is an arithmetic number, because the mean of its divisors is an integer number (13487838).

Almost surely, 2^115609980 is an apocalyptic number.

115609980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115609980 is an abundant number, since it is smaller than the sum of its proper divisors (208098132).

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

115609980 is a wasteful number, since it uses less digits than its factorization.

115609980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926845 (or 1926843 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 115609980 is about 10752.2081453067. The cubic root of 115609980 is about 487.1526941162.

The spelling of 115609980 in words is "one hundred fifteen million, six hundred nine thousand, nine hundred eighty".