395680815 has 16 divisors (see below), whose sum is σ = 703432800. Its totient is φ = 211029696.

The previous prime is 395680811. The next prime is 395680829. The reversal of 395680815 is 518086593.

395680815 is a `hidden beast` number, since 3 + 9 + 568 + 0 + 81 + 5 = 666.

It is not a de Polignac number, because 395680815 - 2² = 395680811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395680811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465350 + ... + 1465619.

It is an arithmetic number, because the mean of its divisors is an integer number (43964550).

Almost surely, 2^395680815 is an apocalyptic number.

395680815 is a deficient number, since it is larger than the sum of its proper divisors (307751985).

395680815 is a wasteful number, since it uses less digits than its factorization.

395680815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930983 (or 2930977 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 395680815 is about 19891.7273005639. The cubic root of 395680815 is about 734.1446943792.

It can be divided in two parts, 395680 and 815, that added together give a triangular number (396495 = T₈₉₀).

The spelling of 395680815 in words is "three hundred ninety-five million, six hundred eighty thousand, eight hundred fifteen".