113722128 has 90 divisors (see below), whose sum is σ = 344702826. Its totient is φ = 34983936.

The previous prime is 113722099. The next prime is 113722139. The reversal of 113722128 is 821227311.

It can be written as a sum of positive squares in 3 ways, for example, as 9437184 + 104284944 = 3072^2 + 10212^2 .

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 22000 + ... + 26672.

Almost surely, 2^113722128 is an apocalyptic number.

113722128 is a gapful number since it is divisible by the number (18) 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 113722128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172351413).

113722128 is an abundant number, since it is smaller than the sum of its proper divisors (230980698).

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

113722128 is a wasteful number, since it uses less digits than its factorization.

113722128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4713 (or 4691 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 113722128 is about 10664.0577642847. The cubic root of 113722128 is about 484.4864766967.

Adding to 113722128 its reverse (821227311), we get a palindrome (934949439).

The spelling of 113722128 in words is "one hundred thirteen million, seven hundred twenty-two thousand, one hundred twenty-eight".