231400368 has 160 divisors (see below), whose sum is σ = 705669120. Its totient is φ = 72472320.

The previous prime is 231400363. The next prime is 231400381. The reversal of 231400368 is 863004132.

It is a happy number.

It is a super-2 number, since 2×231400368² = 107092260621070848, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231400363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495271 + ... + 495737.

It is an arithmetic number, because the mean of its divisors is an integer number (4410432).

Almost surely, 2^231400368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231400368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352834560).

231400368 is an abundant number, since it is smaller than the sum of its proper divisors (474268752).

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

231400368 is a wasteful number, since it uses less digits than its factorization.

231400368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 231400368 is about 15211.8495916835. The cubic root of 231400368 is about 613.9335234859.

The spelling of 231400368 in words is "two hundred thirty-one million, four hundred thousand, three hundred sixty-eight".