390439 has 12 divisors (see below), whose sum is σ = 476464. Its totient is φ = 313344.

The previous prime is 390437. The next prime is 390449. The reversal of 390439 is 934093.

It is not a de Polignac number, because 390439 - 2¹ = 390437 is a prime.

It is a super-2 number, since 2×390439² = 304885225442, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1927 + ... + 2119.

2³⁹⁰⁴³⁹ is an apocalyptic number.

390439 is a deficient number, since it is larger than the sum of its proper divisors (86025).

390439 is a wasteful number, since it uses less digits than its factorization.

390439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 390439 is about 624.8511822826. The cubic root of 390439 is about 73.0888391109.

The spelling of 390439 in words is "three hundred ninety thousand, four hundred thirty-nine".