115780180 has 24 divisors (see below), whose sum is σ = 251523720. Its totient is φ = 44714880.

The previous prime is 115780169. The next prime is 115780201. The reversal of 115780180 is 81087511.

It can be written as a sum of positive squares in 4 ways, for example, as 4519876 + 111260304 = 2126^2 + 10548^2 .

It is a super-3 number, since 3×115780180³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99231 + ... + 100390.

It is an arithmetic number, because the mean of its divisors is an integer number (10480155).

Almost surely, 2^115780180 is an apocalyptic number.

115780180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115780180 is an abundant number, since it is smaller than the sum of its proper divisors (135743540).

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

115780180 is a wasteful number, since it uses less digits than its factorization.

115780180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199659 (or 199657 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 115780180 is about 10760.1198878079. The cubic root of 115780180 is about 487.3916375409.

The spelling of 115780180 in words is "one hundred fifteen million, seven hundred eighty thousand, one hundred eighty".