390895 has 4 divisors (see below), whose sum is σ = 469080. Its totient is φ = 312712.

The previous prime is 390893. The next prime is 390953. The reversal of 390895 is 598093.

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 390895 - 2¹ = 390893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39085 + ... + 39094.

It is an arithmetic number, because the mean of its divisors is an integer number (117270).

390895 is a Friedman number, since it can be written as 9*(30+5^8/9), using all its digits and the basic arithmetic operations.

2³⁹⁰⁸⁹⁵ is an apocalyptic number.

390895 is a deficient number, since it is larger than the sum of its proper divisors (78185).

390895 is an equidigital number, since it uses as much as digits as its factorization.

390895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78184.

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

The square root of 390895 is about 625.2159626881. The cubic root of 390895 is about 73.1172819185.

The spelling of 390895 in words is "three hundred ninety thousand, eight hundred ninety-five".