231893438 has 16 divisors (see below), whose sum is σ = 401632224. Its totient is φ = 98357760.

The previous prime is 231893437. The next prime is 231893443. The reversal of 231893438 is 834398132.

It is a junction number, because it is equal to n+sod(n) for n = 231893395 and 231893404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231893437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84023 + ... + 86738.

It is an arithmetic number, because the mean of its divisors is an integer number (25102014).

Almost surely, 2^231893438 is an apocalyptic number.

231893438 is a deficient number, since it is larger than the sum of its proper divisors (169738786).

231893438 is a wasteful number, since it uses less digits than its factorization.

231893438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170867.

The product of its digits is 124416, while the sum is 41.

The square root of 231893438 is about 15228.0477409286. The cubic root of 231893438 is about 614.3692725038.

The spelling of 231893438 in words is "two hundred thirty-one million, eight hundred ninety-three thousand, four hundred thirty-eight".