395731 has 4 divisors (see below), whose sum is σ = 452272. Its totient is φ = 339192.

The previous prime is 395719. The next prime is 395737. The reversal of 395731 is 137593.

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

It is not a de Polignac number, because 395731 - 2¹¹ = 393683 is a prime.

It is a super-2 number, since 2×395731² = 313206048722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 395731.

It is not an unprimeable number, because it can be changed into a prime (395737) 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, 28260 + ... + 28273.

It is an arithmetic number, because the mean of its divisors is an integer number (113068).

2³⁹⁵⁷³¹ is an apocalyptic number.

395731 is a deficient number, since it is larger than the sum of its proper divisors (56541).

395731 is an equidigital number, since it uses as much as digits as its factorization.

395731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56540.

The product of its digits is 2835, while the sum is 28.

The square root of 395731 is about 629.0715380622. The cubic root of 395731 is about 73.4175730754.

The spelling of 395731 in words is "three hundred ninety-five thousand, seven hundred thirty-one".