231928 has 16 divisors (see below), whose sum is σ = 443880. Its totient is φ = 113568.

The previous prime is 231923. The next prime is 231943. The reversal of 231928 is 829132.

231928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151 + ... + 697.

2²³¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

231928 is a deficient number, since it is larger than the sum of its proper divisors (211952).

231928 is a wasteful number, since it uses less digits than its factorization.

231928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 602 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 231928 is about 481.5890364201. The cubic root of 231928 is about 61.4399793385.

It can be divided in two parts, 23 and 1928, that multiplied together give a palindrome (44344).

The spelling of 231928 in words is "two hundred thirty-one thousand, nine hundred twenty-eight".