113212640 has 96 divisors (see below), whose sum is σ = 284497920. Its totient is φ = 42453504.

The previous prime is 113212591. The next prime is 113212657. The reversal of 113212640 is 46212311.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507569 + ... + 507791.

It is an arithmetic number, because the mean of its divisors is an integer number (2963520).

Almost surely, 2^113212640 is an apocalyptic number.

113212640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113212640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142248960).

113212640 is an abundant number, since it is smaller than the sum of its proper divisors (171285280).

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

113212640 is a wasteful number, since it uses less digits than its factorization.

113212640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 113212640 is about 10640.1428561838. The cubic root of 113212640 is about 483.7618754415.

Adding to 113212640 its reverse (46212311), we get a palindrome (159424951).

The spelling of 113212640 in words is "one hundred thirteen million, two hundred twelve thousand, six hundred forty".