395638218 has 24 divisors (see below), whose sum is σ = 858744900. Its totient is φ = 131644224.

The previous prime is 395638211. The next prime is 395638219. The reversal of 395638218 is 812836593.

It is a happy number.

395638218 is a `hidden beast` number, since 3 + 9 + 5 + 638 + 2 + 1 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 306845289 + 88792929 = 17517^2 + 9423^2 .

It is not an unprimeable number, because it can be changed into a prime (395638211) 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 11 ways as a sum of consecutive naturals, for example, 9073 + ... + 29556.

Almost surely, 2^395638218 is an apocalyptic number.

395638218 is an abundant number, since it is smaller than the sum of its proper divisors (463106682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

395638218 is a wasteful number, since it uses less digits than its factorization.

395638218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39206 (or 39203 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 395638218 is about 19890.6565502499. The cubic root of 395638218 is about 734.1183486626.

The spelling of 395638218 in words is "three hundred ninety-five million, six hundred thirty-eight thousand, two hundred eighteen".