231389400 has 96 divisors (see below), whose sum is σ = 782539200. Its totient is φ = 56092800.

The previous prime is 231389399. The next prime is 231389419. The reversal of 231389400 is 4983132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10930 + ... + 24129.

It is an arithmetic number, because the mean of its divisors is an integer number (8151450).

Almost surely, 2^231389400 is an apocalyptic number.

231389400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231389400 is an abundant number, since it is smaller than the sum of its proper divisors (551149800).

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

231389400 is a wasteful number, since it uses less digits than its factorization.

231389400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35089 (or 35080 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 231389400 is about 15211.4890789824. The cubic root of 231389400 is about 613.9238235168.

The spelling of 231389400 in words is "two hundred thirty-one million, three hundred eighty-nine thousand, four hundred".