395643 has 8 divisors (see below), whose sum is σ = 539968. Its totient is φ = 257544.

The previous prime is 395627. The next prime is 395657. The reversal of 395643 is 346593.

It is a happy number.

395643 is nontrivially palindromic in base 7.

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

It is not a de Polignac number, because 395643 - 2⁴ = 395627 is a prime.

It is a Duffinian number.

395643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 395643.

It is not an unprimeable number, because it can be changed into a prime (395243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1405 + ... + 1662.

It is an arithmetic number, because the mean of its divisors is an integer number (67496).

2³⁹⁵⁶⁴³ is an apocalyptic number.

395643 is a deficient number, since it is larger than the sum of its proper divisors (144325).

395643 is a wasteful number, since it uses less digits than its factorization.

395643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113.

The product of its digits is 9720, while the sum is 30.

The square root of 395643 is about 629.0015898231. The cubic root of 395643 is about 73.4121306365.

The spelling of 395643 in words is "three hundred ninety-five thousand, six hundred forty-three".