115780280 has 64 divisors (see below), whose sum is σ = 324794880. Its totient is φ = 36086400.

The previous prime is 115780279. The next prime is 115780309. The reversal of 115780280 is 82087511.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15716 + ... + 21875.

It is an arithmetic number, because the mean of its divisors is an integer number (5074920).

Almost surely, 2^115780280 is an apocalyptic number.

115780280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115780280 is an abundant number, since it is smaller than the sum of its proper divisors (209014600).

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

115780280 is a wasteful number, since it uses less digits than its factorization.

115780280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37620 (or 37616 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 115780280 is about 10760.1245345953. The cubic root of 115780280 is about 487.3917778618.

The spelling of 115780280 in words is "one hundred fifteen million, seven hundred eighty thousand, two hundred eighty".