236138 has 16 divisors (see below), whose sum is σ = 411264. Its totient is φ = 99600.

The previous prime is 236129. The next prime is 236143. The reversal of 236138 is 831632.

It is a super-2 number, since 2×236138² = 111522310088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

236138 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, 1331 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (25704).

2²³⁶¹³⁸ is an apocalyptic number.

236138 is a deficient number, since it is larger than the sum of its proper divisors (175126).

236138 is a wasteful number, since it uses less digits than its factorization.

236138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277.

The product of its digits is 864, while the sum is 23.

The square root of 236138 is about 485.9403255545. The cubic root of 236138 is about 61.8095089804.

The spelling of 236138 in words is "two hundred thirty-six thousand, one hundred thirty-eight".