113611638 has 64 divisors (see below), whose sum is σ = 266434560. Its totient is φ = 31629312.

The previous prime is 113611627. The next prime is 113611679. The reversal of 113611638 is 836116311.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321670 + ... + 322022.

It is an arithmetic number, because the mean of its divisors is an integer number (4163040).

Almost surely, 2^113611638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113611638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133217280).

113611638 is an abundant number, since it is smaller than the sum of its proper divisors (152822922).

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

113611638 is a wasteful number, since it uses less digits than its factorization.

113611638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its digits is 2592, while the sum is 30.

The square root of 113611638 is about 10658.8760195435. The cubic root of 113611638 is about 484.3295202696.

Adding to 113611638 its reverse (836116311), we get a palindrome (949727949).

The spelling of 113611638 in words is "one hundred thirteen million, six hundred eleven thousand, six hundred thirty-eight".