115390720 has 36 divisors (see below), whose sum is σ = 276399900. Its totient is φ = 46155776.

The previous prime is 115390697. The next prime is 115390777. The reversal of 115390720 is 27093511.

It can be written as a sum of positive squares in 2 ways, for example, as 18249984 + 97140736 = 4272^2 + 9856^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43795 + ... + 46354.

It is an arithmetic number, because the mean of its divisors is an integer number (7677775).

Almost surely, 2^115390720 is an apocalyptic number.

115390720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115390720 is an abundant number, since it is smaller than the sum of its proper divisors (161009180).

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

115390720 is an frugal number, since it uses more digits than its factorization.

115390720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90170 (or 90156 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 115390720 is about 10742.0072612152. The cubic root of 115390720 is about 486.8445295546.

The spelling of 115390720 in words is "one hundred fifteen million, three hundred ninety thousand, seven hundred twenty".