231996400 has 120 divisors (see below), whose sum is σ = 588962304. Its totient is φ = 87648000.

The previous prime is 231996379. The next prime is 231996407. The reversal of 231996400 is 4699132.

It is a super-2 number, since 2×231996400² = 107644659225920000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231996407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1389117 + ... + 1389283.

Almost surely, 2^231996400 is an apocalyptic number.

231996400 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 231996400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294481152).

231996400 is an abundant number, since it is smaller than the sum of its proper divisors (356965904).

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

231996400 is a wasteful number, since it uses less digits than its factorization.

231996400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 231996400 is about 15231.4280354798. The cubic root of 231996400 is about 614.4601868619.

The spelling of 231996400 in words is "two hundred thirty-one million, nine hundred ninety-six thousand, four hundred".