113640644 has 24 divisors (see below), whose sum is σ = 214888128. Its totient is φ = 52273440.

The previous prime is 113640623. The next prime is 113640671. The reversal of 113640644 is 446046311.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12659 + ... + 19685.

It is an arithmetic number, because the mean of its divisors is an integer number (8953672).

Almost surely, 2^113640644 is an apocalyptic number.

It is an amenable number.

113640644 is a deficient number, since it is larger than the sum of its proper divisors (101247484).

113640644 is a wasteful number, since it uses less digits than its factorization.

113640644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355 (or 7353 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 113640644 is about 10660.2365827406. The cubic root of 113640644 is about 484.3707345528.

Adding to 113640644 its reverse (446046311), we get a palindrome (559686955).

The spelling of 113640644 in words is "one hundred thirteen million, six hundred forty thousand, six hundred forty-four".