113639620 has 12 divisors (see below), whose sum is σ = 238643244. Its totient is φ = 45455840.

The previous prime is 113639609. The next prime is 113639629. The reversal of 113639620 is 26936311.

It can be written as a sum of positive squares in 2 ways, for example, as 38713284 + 74926336 = 6222^2 + 8656^2 .

It is not an unprimeable number, because it can be changed into a prime (113639629) 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, 2840971 + ... + 2841010.

It is an arithmetic number, because the mean of its divisors is an integer number (19886937).

Almost surely, 2^113639620 is an apocalyptic number.

113639620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113639620 is an abundant number, since it is smaller than the sum of its proper divisors (125003624).

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

113639620 is a wasteful number, since it uses less digits than its factorization.

113639620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681990 (or 5681988 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 113639620 is about 10660.1885536795. The cubic root of 113639620 is about 484.3692796827.

The spelling of 113639620 in words is "one hundred thirteen million, six hundred thirty-nine thousand, six hundred twenty".