395815 has 16 divisors (see below), whose sum is σ = 557568. Its totient is φ = 264096.

The previous prime is 395803. The next prime is 395849. The reversal of 395815 is 518593.

It is not a de Polignac number, because 395815 - 2⁷ = 395687 is a prime.

It is a Duffinian number.

395815 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1374 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (34848).

2³⁹⁵⁸¹⁵ is an apocalyptic number.

395815 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

395815 is a deficient number, since it is larger than the sum of its proper divisors (161753).

395815 is a wasteful number, since it uses less digits than its factorization.

395815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its digits is 5400, while the sum is 31.

The square root of 395815 is about 629.1382995813. The cubic root of 395815 is about 73.4227673781.

The spelling of 395815 in words is "three hundred ninety-five thousand, eight hundred fifteen".