395578690 has 16 divisors (see below), whose sum is σ = 766814328. Its totient is φ = 146059776.

The previous prime is 395578681. The next prime is 395578709. The reversal of 395578690 is 96875593.

It can be written as a sum of positive squares in 4 ways, for example, as 185531641 + 210047049 = 13621^2 + 14493^2 .

It is a super-2 number, since 2×395578690² = 312964999964232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1521327 + ... + 1521586.

Almost surely, 2^395578690 is an apocalyptic number.

395578690 is a deficient number, since it is larger than the sum of its proper divisors (371235638).

395578690 is a wasteful number, since it uses less digits than its factorization.

395578690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042933.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 395578690 is about 19889.1601129862. The cubic root of 395578690 is about 734.0815281643.

The spelling of 395578690 in words is "three hundred ninety-five million, five hundred seventy-eight thousand, six hundred ninety".