231407040 has 56 divisors (see below), whose sum is σ = 734720400. Its totient is φ = 61708288.

The previous prime is 231407039. The next prime is 231407041. The reversal of 231407040 is 40704132.

It is an interprime number because it is at equal distance from previous prime (231407039) and next prime (231407041).

It is a junction number, because it is equal to n+sod(n) for n = 231406998 and 231407016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231407041) 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, 119565 + ... + 121484.

Almost surely, 2^231407040 is an apocalyptic number.

231407040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231407040 is an abundant number, since it is smaller than the sum of its proper divisors (503313360).

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

231407040 is a wasteful number, since it uses less digits than its factorization.

231407040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241069 (or 241059 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 231407040 is about 15212.0688928232. The cubic root of 231407040 is about 613.9394239736.

The spelling of 231407040 in words is "two hundred thirty-one million, four hundred seven thousand, forty".