395817872 has 20 divisors (see below), whose sum is σ = 767712396. Its totient is φ = 197698560.

The previous prime is 395817809. The next prime is 395817883. The reversal of 395817872 is 278718593.

It can be written as a sum of positive squares in 2 ways, for example, as 347598736 + 48219136 = 18644^2 + 6944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 395817872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2972 + ... + 28292.

Almost surely, 2^395817872 is an apocalyptic number.

It is an amenable number.

395817872 is a deficient number, since it is larger than the sum of its proper divisors (371894524).

395817872 is a wasteful number, since it uses less digits than its factorization.

395817872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26306 (or 26300 counting only the distinct ones).

The product of its digits is 846720, while the sum is 50.

The square root of 395817872 is about 19895.1720776675. The cubic root of 395817872 is about 734.2294496080.

The spelling of 395817872 in words is "three hundred ninety-five million, eight hundred seventeen thousand, eight hundred seventy-two".