390835 has 4 divisors (see below), whose sum is σ = 469008. Its totient is φ = 312664.

The previous prime is 390829. The next prime is 390851. The reversal of 390835 is 538093.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 390835 - 2⁷ = 390707 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is an unprimeable number.

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, 39079 + ... + 39088.

It is an arithmetic number, because the mean of its divisors is an integer number (117252).

2³⁹⁰⁸³⁵ is an apocalyptic number.

390835 is a deficient number, since it is larger than the sum of its proper divisors (78173).

390835 is an equidigital number, since it uses as much as digits as its factorization.

390835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78172.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 390835 is about 625.1679774269. The cubic root of 390835 is about 73.1135407080.

It can be divided in two parts, 390 and 835, that added together give a triangular number (1225 = T₄₉).

The spelling of 390835 in words is "three hundred ninety thousand, eight hundred thirty-five".