231988938 has 8 divisors (see below), whose sum is σ = 463977888. Its totient is φ = 77329644.

The previous prime is 231988937. The next prime is 231988943. The reversal of 231988938 is 839889132.

It is a sphenic number, since it is the product of 3 distinct primes.

231988938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (231988931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19332406 + ... + 19332417.

It is an arithmetic number, because the mean of its divisors is an integer number (57997236).

Almost surely, 2^231988938 is an apocalyptic number.

231988938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231988938 is a wasteful number, since it uses less digits than its factorization.

231988938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38664828.

The product of its digits is 746496, while the sum is 51.

The square root of 231988938 is about 15231.1830794591. The cubic root of 231988938 is about 614.4535988990.

The spelling of 231988938 in words is "two hundred thirty-one million, nine hundred eighty-eight thousand, nine hundred thirty-eight".