390165 has 24 divisors (see below), whose sum is σ = 675360. Its totient is φ = 191808.

The previous prime is 390161. The next prime is 390191. The reversal of 390165 is 561093.

390165 = 16² + 17² + ... + 105².

It is not a de Polignac number, because 390165 - 2² = 390161 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10527 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (28140).

2³⁹⁰¹⁶⁵ is an apocalyptic number.

It is an amenable number.

390165 is a deficient number, since it is larger than the sum of its proper divisors (285195).

390165 is a wasteful number, since it uses less digits than its factorization.

390165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 390165 is about 624.6318915970. The cubic root of 390165 is about 73.0717378237.

It can be divided in two parts, 390 and 165, that added together give a palindrome (555).

The spelling of 390165 in words is "three hundred ninety thousand, one hundred sixty-five".