390015 has 28 divisors (see below), whose sum is σ = 708264. Its totient is φ = 206064.

The previous prime is 390001. The next prime is 390043. The reversal of 390015 is 510093.

It is not a de Polignac number, because 390015 - 2⁴ = 389999 is a prime.

It is a super-2 number, since 2×390015² = 304223400450, which contains 22 as substring.

390015 is a lucky number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 390015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3592 + ... + 3698.

2³⁹⁰⁰¹⁵ is an apocalyptic number.

390015 is a deficient number, since it is larger than the sum of its proper divisors (318249).

390015 is an equidigital number, since it uses as much as digits as its factorization.

390015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 390015 is about 624.5118093359. The cubic root of 390015 is about 73.0623724137.

The spelling of 390015 in words is "three hundred ninety thousand, fifteen".