113921388 has 72 divisors (see below), whose sum is σ = 331199232. Its totient is φ = 32342112.

The previous prime is 113921387. The next prime is 113921393. The reversal of 113921388 is 883129311.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113921383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40731 + ... + 43437.

Almost surely, 2^113921388 is an apocalyptic number.

113921388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113921388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165599616).

113921388 is an abundant number, since it is smaller than the sum of its proper divisors (217277844).

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

113921388 is a wasteful number, since it uses less digits than its factorization.

113921388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891 (or 2886 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 113921388 is about 10673.3962729770. The cubic root of 113921388 is about 484.7692784342.

The spelling of 113921388 in words is "one hundred thirteen million, nine hundred twenty-one thousand, three hundred eighty-eight".