231242880 has 128 divisors (see below), whose sum is σ = 804168000. Its totient is φ = 56053760.

The previous prime is 231242831. The next prime is 231242917. The reversal of 231242880 is 88242132.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15646 + ... + 26594.

Almost surely, 2^231242880 is an apocalyptic number.

231242880 is a gapful number since it is divisible by the number (20) 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 231242880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402084000).

231242880 is an abundant number, since it is smaller than the sum of its proper divisors (572925120).

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

231242880 is a wasteful number, since it uses less digits than its factorization.

231242880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10982 (or 10970 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 231242880 is about 15206.6722197856. The cubic root of 231242880 is about 613.7942135580.

The spelling of 231242880 in words is "two hundred thirty-one million, two hundred forty-two thousand, eight hundred eighty".