231469840 has 80 divisors (see below), whose sum is σ = 621174528. Its totient is φ = 78571008.

The previous prime is 231469831. The next prime is 231469867. The reversal of 231469840 is 48964132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 231469840.

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, 55674 + ... + 59686.

Almost surely, 2^231469840 is an apocalyptic number.

231469840 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 231469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310587264).

231469840 is an abundant number, since it is smaller than the sum of its proper divisors (389704688).

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

231469840 is a wasteful number, since it uses less digits than its factorization.

231469840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136 (or 4130 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 231469840 is about 15214.1329033238. The cubic root of 231469840 is about 613.9949565806.

The spelling of 231469840 in words is "two hundred thirty-one million, four hundred sixty-nine thousand, eight hundred forty".