230128 has 20 divisors (see below), whose sum is σ = 469960. Its totient is φ = 108864.

The previous prime is 230123. The next prime is 230137. The reversal of 230128 is 821032.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230123) by changing a digit.

230128 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 3 ways as a sum of consecutive naturals, for example, 75 + ... + 682.

It is an arithmetic number, because the mean of its divisors is an integer number (23498).

2²³⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

230128 is an abundant number, since it is smaller than the sum of its proper divisors (239832).

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

230128 is a wasteful number, since it uses less digits than its factorization.

230128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 778 counting only the distinct ones).

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

The square root of 230128 is about 479.7165829946. The cubic root of 230128 is about 61.2806205356.

Subtracting from 230128 its product of nonzero digits (96), we obtain a palindrome (230032).

The spelling of 230128 in words is "two hundred thirty thousand, one hundred twenty-eight".