865238 has 16 divisors (see below), whose sum is σ = 1439424. Its totient is φ = 386760.

The previous prime is 865231. The next prime is 865247. The reversal of 865238 is 832568.

It is a d-powerful number, because it can be written as 8⁴ + 6² + 2¹⁹ + 5⁶ + 3¹⁰ + 8⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865231) by changing a digit.

865238 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, 1181 + ... + 1767.

It is an arithmetic number, because the mean of its divisors is an integer number (89964).

2⁸⁶⁵²³⁸ is an apocalyptic number.

865238 is a deficient number, since it is larger than the sum of its proper divisors (574186).

865238 is a wasteful number, since it uses less digits than its factorization.

865238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667.

The product of its digits is 11520, while the sum is 32.

The square root of 865238 is about 930.1817026796. The cubic root of 865238 is about 95.2895322066.

Adding to 865238 its sum of digits (32), we get a triangular number (865270 = T₁₃₁₅).

The spelling of 865238 in words is "eight hundred sixty-five thousand, two hundred thirty-eight".