231839406 has 48 divisors (see below), whose sum is σ = 537473040. Its totient is φ = 72005760.

The previous prime is 231839357. The next prime is 231839407. The reversal of 231839406 is 604938132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231839407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15306 + ... + 26418.

It is an arithmetic number, because the mean of its divisors is an integer number (11197355).

Almost surely, 2^231839406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231839406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268736520).

231839406 is an abundant number, since it is smaller than the sum of its proper divisors (305633634).

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

231839406 is a wasteful number, since it uses less digits than its factorization.

231839406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11201 (or 11198 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 231839406 is about 15226.2735427944. The cubic root of 231839406 is about 614.3215520517.

The spelling of 231839406 in words is "two hundred thirty-one million, eight hundred thirty-nine thousand, four hundred six".