395665220 has 12 divisors (see below), whose sum is σ = 830897004. Its totient is φ = 158266080.

The previous prime is 395665213. The next prime is 395665229. The reversal of 395665220 is 22566593.

It can be written as a sum of positive squares in 2 ways, for example, as 59969536 + 335695684 = 7744^2 + 18322^2 .

It is not an unprimeable number, because it can be changed into a prime (395665229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9891611 + ... + 9891650.

It is an arithmetic number, because the mean of its divisors is an integer number (69241417).

Almost surely, 2^395665220 is an apocalyptic number.

It is an amenable number.

395665220 is an abundant number, since it is smaller than the sum of its proper divisors (435231784).

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

395665220 is a wasteful number, since it uses less digits than its factorization.

395665220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19783270 (or 19783268 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 395665220 is about 19891.3352995720. The cubic root of 395665220 is about 734.1350492844.

The spelling of 395665220 in words is "three hundred ninety-five million, six hundred sixty-five thousand, two hundred twenty".