390859 has 4 divisors (see below), whose sum is σ = 446704. Its totient is φ = 335016.

The previous prime is 390851. The next prime is 390869. The reversal of 390859 is 958093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958093 = 313 ⋅3061.

It is a cyclic number.

It is not a de Polignac number, because 390859 - 2³ = 390851 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390851) 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 3 ways as a sum of consecutive naturals, for example, 27912 + ... + 27925.

It is an arithmetic number, because the mean of its divisors is an integer number (111676).

2³⁹⁰⁸⁵⁹ is an apocalyptic number.

390859 is a deficient number, since it is larger than the sum of its proper divisors (55845).

390859 is an equidigital number, since it uses as much as digits as its factorization.

390859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55844.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 390859 is about 625.1871719733. The cubic root of 390859 is about 73.1150372382.

The spelling of 390859 in words is "three hundred ninety thousand, eight hundred fifty-nine".