231401984 has 80 divisors (see below), whose sum is σ = 509404896. Its totient is φ = 104140800.

The previous prime is 231401927. The next prime is 231401999. The reversal of 231401984 is 489104132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 231401984.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019279 + ... + 1019505.

Almost surely, 2^231401984 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 231401984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254702448).

231401984 is an abundant number, since it is smaller than the sum of its proper divisors (278002912).

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

231401984 is a wasteful number, since it uses less digits than its factorization.

231401984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 231401984 is about 15211.9027080770. The cubic root of 231401984 is about 613.9349526312.

The spelling of 231401984 in words is "two hundred thirty-one million, four hundred one thousand, nine hundred eighty-four".