231284844 has 72 divisors (see below), whose sum is σ = 669745440. Its totient is φ = 65924352.

The previous prime is 231284827. The next prime is 231284857. The reversal of 231284844 is 448482132.

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 = 231284799 and 231284808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142582 + ... + 144194.

It is an arithmetic number, because the mean of its divisors is an integer number (9302020).

Almost surely, 2^231284844 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 231284844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334872720).

231284844 is an abundant number, since it is smaller than the sum of its proper divisors (438460596).

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

231284844 is a wasteful number, since it uses less digits than its factorization.

231284844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199 (or 2194 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 231284844 is about 15208.0519462553. The cubic root of 231284844 is about 613.8313400380.

It can be divided in two parts, 23128 and 4844, that added together give a palindrome (27972).

The spelling of 231284844 in words is "two hundred thirty-one million, two hundred eighty-four thousand, eight hundred forty-four".