231406320 has 160 divisors (see below), whose sum is σ = 779950080. Its totient is φ = 56540160.

The previous prime is 231406309. The next prime is 231406327. The reversal of 231406320 is 23604132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231406327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140542 + ... + 142178.

It is an arithmetic number, because the mean of its divisors is an integer number (4874688).

Almost surely, 2^231406320 is an apocalyptic number.

231406320 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 231406320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389975040).

231406320 is an abundant number, since it is smaller than the sum of its proper divisors (548543760).

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

231406320 is a wasteful number, since it uses less digits than its factorization.

231406320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231406320 is about 15212.0452273848. The cubic root of 231406320 is about 613.9387872358.

The spelling of 231406320 in words is "two hundred thirty-one million, four hundred six thousand, three hundred twenty".