113687920 has 20 divisors (see below), whose sum is σ = 264324600. Its totient is φ = 45475136.

The previous prime is 113687909. The next prime is 113687921. The reversal of 113687920 is 29786311.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 113687920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113687921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710470 + ... + 710629.

It is an arithmetic number, because the mean of its divisors is an integer number (13216230).

Almost surely, 2^113687920 is an apocalyptic number.

113687920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113687920 is an abundant number, since it is smaller than the sum of its proper divisors (150636680).

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

113687920 is a wasteful number, since it uses less digits than its factorization.

113687920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421112 (or 1421106 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 113687920 is about 10662.4537513651. The cubic root of 113687920 is about 484.4378934358.

The spelling of 113687920 in words is "one hundred thirteen million, six hundred eighty-seven thousand, nine hundred twenty".