238665 has 16 divisors (see below), whose sum is σ = 436608. Its totient is φ = 109056.

The previous prime is 238657. The next prime is 238673. The reversal of 238665 is 566832.

It is an interprime number because it is at equal distance from previous prime (238657) and next prime (238673).

It is not a de Polignac number, because 238665 - 2³ = 238657 is a prime.

It is a nialpdrome in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1032 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (27288).

2²³⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

238665 is a deficient number, since it is larger than the sum of its proper divisors (197943).

238665 is a wasteful number, since it uses less digits than its factorization.

238665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288.

The product of its digits is 8640, while the sum is 30.

The square root of 238665 is about 488.5335198326. The cubic root of 238665 is about 62.0292092684.

It can be divided in two parts, 23866 and 5, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 238665 in words is "two hundred thirty-eight thousand, six hundred sixty-five".