231307007440 has 40 divisors (see below), whose sum is σ = 538082846208. Its totient is φ = 92472213120.

The previous prime is 231307007411. The next prime is 231307007441. The reversal of 231307007440 is 44700703132.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231307007441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643072 + ... + 936031.

Almost surely, 2^231307007440 is an apocalyptic number.

231307007440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231307007440 is an abundant number, since it is smaller than the sum of its proper divisors (306775838768).

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

231307007440 is a wasteful number, since it uses less digits than its factorization.

231307007440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580947 (or 1580941 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The spelling of 231307007440 in words is "two hundred thirty-one billion, three hundred seven million, seven thousand, four hundred forty".