395081218 has 12 divisors (see below), whose sum is σ = 689376582. Its totient is φ = 169320480.

The previous prime is 395081213. The next prime is 395081233. The reversal of 395081218 is 812180593.

It can be written as a sum of positive squares in only one way, i.e., 359595369 + 35485849 = 18963^2 + 5957^2 .

It is not an unprimeable number, because it can be changed into a prime (395081213) 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 5 ways as a sum of consecutive naturals, for example, 2015623 + ... + 2015818.

Almost surely, 2^395081218 is an apocalyptic number.

395081218 is a deficient number, since it is larger than the sum of its proper divisors (294295364).

395081218 is a wasteful number, since it uses less digits than its factorization.

395081218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031457 (or 4031450 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 395081218 is about 19876.6500698684. The cubic root of 395081218 is about 733.7736769029.

The spelling of 395081218 in words is "three hundred ninety-five million, eighty-one thousand, two hundred eighteen".