113811640 has 32 divisors (see below), whose sum is σ = 256866480. Its totient is φ = 45384192.

The previous prime is 113811637. The next prime is 113811647. The reversal of 113811640 is 46118311.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113811647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9259 + ... + 17701.

Almost surely, 2^113811640 is an apocalyptic number.

113811640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113811640 is an abundant number, since it is smaller than the sum of its proper divisors (143054840).

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

113811640 is a wasteful number, since it uses less digits than its factorization.

113811640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791 (or 8787 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 113811640 is about 10668.2538402496. The cubic root of 113811640 is about 484.6135583266.

Adding to 113811640 its reverse (46118311), we get a palindrome (159929951).

The spelling of 113811640 in words is "one hundred thirteen million, eight hundred eleven thousand, six hundred forty".