232538409 has 24 divisors (see below), whose sum is σ = 347622912. Its totient is φ = 149636160.

The previous prime is 232538357. The next prime is 232538417. The reversal of 232538409 is 904835232.

It is not a de Polignac number, because 232538409 - 2¹⁶ = 232472873 is a prime.

It is a super-2 number, since 2×232538409² = 108148223320502562, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (232538479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139509 + ... + 141165.

It is an arithmetic number, because the mean of its divisors is an integer number (14484288).

Almost surely, 2^232538409 is an apocalyptic number.

It is an amenable number.

232538409 is a deficient number, since it is larger than the sum of its proper divisors (115084503).

232538409 is a wasteful number, since it uses less digits than its factorization.

232538409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 232538409 is about 15249.2101106910. The cubic root of 232538409 is about 614.9383321073.

The spelling of 232538409 in words is "two hundred thirty-two million, five hundred thirty-eight thousand, four hundred nine".