231274440 has 160 divisors (see below), whose sum is σ = 796755960. Its totient is φ = 60134400.

The previous prime is 231274427. The next prime is 231274471. The reversal of 231274440 is 44472132.

It can be written as a sum of positive squares in 4 ways, for example, as 43639236 + 187635204 = 6606^2 + 13698^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 131970 + ... + 133710.

Almost surely, 2^231274440 is an apocalyptic number.

231274440 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 231274440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398377980).

231274440 is an abundant number, since it is smaller than the sum of its proper divisors (565481520).

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

231274440 is a wasteful number, since it uses less digits than its factorization.

231274440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 231274440 is about 15207.7098867647. The cubic root of 231274440 is about 613.8221358076.

The spelling of 231274440 in words is "two hundred thirty-one million, two hundred seventy-four thousand, four hundred forty".