390955 has 4 divisors (see below), whose sum is σ = 469152. Its totient is φ = 312760.

The previous prime is 390953. The next prime is 390959. The reversal of 390955 is 559093.

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

It is not a de Polignac number, because 390955 - 2¹ = 390953 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390953) 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, 39091 + ... + 39100.

It is an arithmetic number, because the mean of its divisors is an integer number (117288).

2³⁹⁰⁹⁵⁵ is an apocalyptic number.

390955 is a deficient number, since it is larger than the sum of its proper divisors (78197).

390955 is an equidigital number, since it uses as much as digits as its factorization.

390955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78196.

The product of its (nonzero) digits is 6075, while the sum is 31.

The square root of 390955 is about 625.2639442667. The cubic root of 390955 is about 73.1210227462.

The spelling of 390955 in words is "three hundred ninety thousand, nine hundred fifty-five".