113021440 has 240 divisors, whose sum is σ = 340069752. Its totient is φ = 35782656.

The previous prime is 113021431. The next prime is 113021459. The reversal of 113021440 is 44120311.

It can be written as a sum of positive squares in 4 ways, for example, as 108493056 + 4528384 = 10416^2 + 2128^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2132454 + ... + 2132506.

Almost surely, 2^113021440 is an apocalyptic number.

113021440 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 113021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170034876).

113021440 is an abundant number, since it is smaller than the sum of its proper divisors (227048312).

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

113021440 is an equidigital number, since it uses as much as digits as its factorization.

113021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 113021440 is about 10631.1542176755. The cubic root of 113021440 is about 483.4893870517.

Adding to 113021440 its reverse (44120311), we get a palindrome (157141751).

The spelling of 113021440 in words is "one hundred thirteen million, twenty-one thousand, four hundred forty".