113381820 has 36 divisors (see below), whose sum is σ = 343925400. Its totient is φ = 30235104.

The previous prime is 113381809. The next prime is 113381861. The reversal of 113381820 is 28183311.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314770 + ... + 315129.

Almost surely, 2^113381820 is an apocalyptic number.

113381820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113381820 is an abundant number, since it is smaller than the sum of its proper divisors (230543580).

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

113381820 is a wasteful number, since it uses less digits than its factorization.

113381820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629914 (or 629909 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 113381820 is about 10648.0899695673. The cubic root of 113381820 is about 484.0027263467.

The spelling of 113381820 in words is "one hundred thirteen million, three hundred eighty-one thousand, eight hundred twenty".