231740440 has 16 divisors (see below), whose sum is σ = 521416080. Its totient is φ = 92696160.

The previous prime is 231740393. The next prime is 231740449. The reversal of 231740440 is 44047132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231740449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2896716 + ... + 2896795.

It is an arithmetic number, because the mean of its divisors is an integer number (32588505).

Almost surely, 2^231740440 is an apocalyptic number.

231740440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231740440 is an abundant number, since it is smaller than the sum of its proper divisors (289675640).

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

231740440 is a wasteful number, since it uses less digits than its factorization.

231740440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5793522 (or 5793518 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 231740440 is about 15223.0233528035. The cubic root of 231740440 is about 614.2341271675.

Adding to 231740440 its reverse (44047132), we get a palindrome (275787572).

The spelling of 231740440 in words is "two hundred thirty-one million, seven hundred forty thousand, four hundred forty".