238905 has 12 divisors (see below), whose sum is σ = 414180. Its totient is φ = 127392.

The previous prime is 238897. The next prime is 238919. The reversal of 238905 is 509832.

It can be written as a sum of positive squares in 2 ways, for example, as 28224 + 210681 = 168^2 + 459^2 .

It is not a de Polignac number, because 238905 - 2³ = 238897 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2610 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (34515).

2²³⁸⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

238905 is a deficient number, since it is larger than the sum of its proper divisors (175275).

238905 is a wasteful number, since it uses less digits than its factorization.

238905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320 (or 5317 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 238905 is about 488.7790912058. The cubic root of 238905 is about 62.0499943618.

The spelling of 238905 in words is "two hundred thirty-eight thousand, nine hundred five".