390005 has 16 divisors (see below), whose sum is σ = 584064. Its totient is φ = 242880.

The previous prime is 390001. The next prime is 390043. The reversal of 390005 is 500093.

It is not a de Polignac number, because 390005 - 2² = 390001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122 + ... + 891.

It is an arithmetic number, because the mean of its divisors is an integer number (36504).

2³⁹⁰⁰⁰⁵ is an apocalyptic number.

390005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

390005 is a deficient number, since it is larger than the sum of its proper divisors (194059).

390005 is a wasteful number, since it uses less digits than its factorization.

390005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 390005 is about 624.5038030309. The cubic root of 390005 is about 73.0617479677.

Adding to 390005 its reverse (500093), we get a palindrome (890098).

It can be divided in two parts, 39000 and 5, that multiplied together give a triangular number (195000 = T₆₂₄).

The spelling of 390005 in words is "three hundred ninety thousand, five".