231459840 has 132 divisors (see below), whose sum is σ = 802161984. Its totient is φ = 61710336.

The previous prime is 231459799. The next prime is 231459853. The reversal of 231459840 is 48954132.

231459840 is a `hidden beast` number, since 23 + 1 + 4 + 598 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 231459795 and 231459804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43569 + ... + 48591.

Almost surely, 2^231459840 is an apocalyptic number.

231459840 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 231459840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401080992).

231459840 is an abundant number, since it is smaller than the sum of its proper divisors (570702144).

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

231459840 is a wasteful number, since it uses less digits than its factorization.

231459840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5054 (or 5033 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 231459840 is about 15213.8042579757. The cubic root of 231459840 is about 613.9861144812.

The spelling of 231459840 in words is "two hundred thirty-one million, four hundred fifty-nine thousand, eight hundred forty".