231988280 has 16 divisors (see below), whose sum is σ = 521973720. Its totient is φ = 92795296.

The previous prime is 231988279. The next prime is 231988303. The reversal of 231988280 is 82889132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2899814 + ... + 2899893.

Almost surely, 2^231988280 is an apocalyptic number.

231988280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231988280 is an abundant number, since it is smaller than the sum of its proper divisors (289985440).

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

231988280 is a wasteful number, since it uses less digits than its factorization.

231988280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799718 (or 5799714 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 231988280 is about 15231.1614790206. The cubic root of 231988280 is about 614.4530179649.

The spelling of 231988280 in words is "two hundred thirty-one million, nine hundred eighty-eight thousand, two hundred eighty".