238928 has 20 divisors (see below), whose sum is σ = 470580. Its totient is φ = 117504.

The previous prime is 238921. The next prime is 238939. The reversal of 238928 is 829832.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 153664 + 85264 = 392^2 + 292^2 .

It is a nialpdrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 238894 and 238903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238921) by changing a digit.

238928 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, 1676 + ... + 1812.

It is an arithmetic number, because the mean of its divisors is an integer number (23529).

2²³⁸⁹²⁸ is an apocalyptic number.

It is an amenable number.

238928 is a deficient number, since it is larger than the sum of its proper divisors (231652).

238928 is a wasteful number, since it uses less digits than its factorization.

238928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 248 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 238928 is about 488.8026186509. The cubic root of 238928 is about 62.0519855355.

The spelling of 238928 in words is "two hundred thirty-eight thousand, nine hundred twenty-eight".