231686868 has 48 divisors (see below), whose sum is σ = 622307840. Its totient is φ = 65716704.

The previous prime is 231686867. The next prime is 231686891. The reversal of 231686868 is 868686132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231686867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1755 + ... + 21597.

Almost surely, 2^231686868 is an apocalyptic number.

231686868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231686868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311153920).

231686868 is an abundant number, since it is smaller than the sum of its proper divisors (390620972).

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

231686868 is a wasteful number, since it uses less digits than its factorization.

231686868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19996 (or 19994 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 231686868 is about 15221.2636794716. The cubic root of 231686868 is about 614.1867921885.

The spelling of 231686868 in words is "two hundred thirty-one million, six hundred eighty-six thousand, eight hundred sixty-eight".