115780 has 24 divisors (see below), whose sum is σ = 278208. Its totient is φ = 39648.

The previous prime is 115777. The next prime is 115781. The reversal of 115780 is 87511.

115780 = 15² + 16² + ... + 70².

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (115781) 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, 274 + ... + 553.

It is an arithmetic number, because the mean of its divisors is an integer number (11592).

2¹¹⁵⁷⁸⁰ is an apocalyptic number.

115780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115780 is an abundant number, since it is smaller than the sum of its proper divisors (162428).

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

115780 is a wasteful number, since it uses less digits than its factorization.

115780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 115780 is about 340.2646029196. The cubic root of 115780 is about 48.7391384963.

The spelling of 115780 in words is "one hundred fifteen thousand, seven hundred eighty".