390565 has 8 divisors (see below), whose sum is σ = 535680. Its totient is φ = 267792.

The previous prime is 390553. The next prime is 390581. The reversal of 390565 is 565093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390565 - 2⁷ = 390437 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5545 + ... + 5614.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

390565 is a Friedman number, since it can be written as 5^(5+9/3)-60, using all its digits and the basic arithmetic operations.

2³⁹⁰⁵⁶⁵ is an apocalyptic number.

390565 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

390565 is a deficient number, since it is larger than the sum of its proper divisors (145115).

390565 is a wasteful number, since it uses less digits than its factorization.

390565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11171.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 390565 is about 624.9519981567. The cubic root of 390565 is about 73.0967005210.

The spelling of 390565 in words is "three hundred ninety thousand, five hundred sixty-five".