231028 has 24 divisors (see below), whose sum is σ = 476672. Its totient is φ = 95904.

The previous prime is 231019. The next prime is 231031. The reversal of 231028 is 820132.

It is a happy number.

231028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

231028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925 + ... + 1147.

2²³¹⁰²⁸ is an apocalyptic number.

231028 is a gapful number since it is divisible by the number (28) 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 231028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238336).

231028 is an abundant number, since it is smaller than the sum of its proper divisors (245644).

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

231028 is a wasteful number, since it uses less digits than its factorization.

231028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 231028 is about 480.6537215085. The cubic root of 231028 is about 61.3604034045.

The spelling of 231028 in words is "two hundred thirty-one thousand, twenty-eight".