395978885 has 4 divisors (see below), whose sum is σ = 475174668. Its totient is φ = 316783104.

The previous prime is 395978851. The next prime is 395978887. The reversal of 395978885 is 588879593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588879593 = 2297 ⋅256369.

It can be written as a sum of positive squares in 2 ways, for example, as 203518756 + 192460129 = 14266^2 + 13873^2 .

It is a cyclic number.

It is not a de Polignac number, because 395978885 - 2²⁶ = 328870021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395978887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39597884 + ... + 39597893.

It is an arithmetic number, because the mean of its divisors is an integer number (118793667).

Almost surely, 2^395978885 is an apocalyptic number.

It is an amenable number.

395978885 is a deficient number, since it is larger than the sum of its proper divisors (79195783).

395978885 is an equidigital number, since it uses as much as digits as its factorization.

395978885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79195782.

The product of its digits is 21772800, while the sum is 62.

The square root of 395978885 is about 19899.2182007234. The cubic root of 395978885 is about 734.3289940940.

The spelling of 395978885 in words is "three hundred ninety-five million, nine hundred seventy-eight thousand, eight hundred eighty-five".