113128538 has 8 divisors (see below), whose sum is σ = 172017588. Its totient is φ = 55789344.

The previous prime is 113128531. The next prime is 113128549. The reversal of 113128538 is 835821311.

It can be written as a sum of positive squares in 2 ways, for example, as 99460729 + 13667809 = 9973^2 + 3697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×113128538² = 25596132220034888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (113128531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387281 + ... + 387572.

Almost surely, 2^113128538 is an apocalyptic number.

113128538 is a deficient number, since it is larger than the sum of its proper divisors (58889050).

113128538 is an equidigital number, since it uses as much as digits as its factorization.

113128538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774928.

The product of its digits is 5760, while the sum is 32.

The square root of 113128538 is about 10636.1900133459. The cubic root of 113128538 is about 483.6420554285.

Adding to 113128538 its reverse (835821311), we get a palindrome (948949849).

The spelling of 113128538 in words is "one hundred thirteen million, one hundred twenty-eight thousand, five hundred thirty-eight".