231978600 has 576 divisors, whose sum is σ = 1020470400. Its totient is φ = 47278080.

The previous prime is 231978587. The next prime is 231978601. The reversal of 231978600 is 6879132.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (231978601) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12209391 + ... + 12209409.

It is an arithmetic number, because the mean of its divisors is an integer number (1771650).

Almost surely, 2^231978600 is an apocalyptic number.

231978600 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 231978600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510235200).

231978600 is an abundant number, since it is smaller than the sum of its proper divisors (788491800).

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

231978600 is a wasteful number, since it uses less digits than its factorization.

231978600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 231978600 is about 15230.8437061116. The cubic root of 231978600 is about 614.4444715735. Note that the first 4 decimals are identical.

The spelling of 231978600 in words is "two hundred thirty-one million, nine hundred seventy-eight thousand, six hundred".