231782868 has 72 divisors (see below), whose sum is σ = 615608448. Its totient is φ = 73389888.

The previous prime is 231782849. The next prime is 231782869. The reversal of 231782868 is 868287132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231782869) 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, 129105 + ... + 130887.

Almost surely, 2^231782868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231782868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307804224).

231782868 is an abundant number, since it is smaller than the sum of its proper divisors (383825580).

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

231782868 is a wasteful number, since it uses less digits than its factorization.

231782868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1968 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 231782868 is about 15224.4168361222. The cubic root of 231782868 is about 614.2716103898.

The spelling of 231782868 in words is "two hundred thirty-one million, seven hundred eighty-two thousand, eight hundred sixty-eight".