113428 has 12 divisors (see below), whose sum is σ = 226912. Its totient is φ = 48600.

The previous prime is 113417. The next prime is 113437. The reversal of 113428 is 824311.

113428 is an admirable number.

It is a super-2 number, since 2×113428² = 25731822368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1998 + ... + 2053.

2¹¹³⁴²⁸ is an apocalyptic number.

It is an amenable number.

113428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

113428 is a wasteful number, since it uses less digits than its factorization.

113428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062 (or 4060 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 113428 is about 336.7907362146. The cubic root of 113428 is about 48.4068428273.

Adding to 113428 its reverse (824311), we get a palindrome (937739).

The spelling of 113428 in words is "one hundred thirteen thousand, four hundred twenty-eight".