395869640 has 16 divisors (see below), whose sum is σ = 890706780. Its totient is φ = 158347840.

The previous prime is 395869631. The next prime is 395869651. The reversal of 395869640 is 46968593.

It can be written as a sum of positive squares in 2 ways, for example, as 382046116 + 13823524 = 19546^2 + 3718^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4948331 + ... + 4948410.

Almost surely, 2^395869640 is an apocalyptic number.

It is an amenable number.

395869640 is an abundant number, since it is smaller than the sum of its proper divisors (494837140).

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

395869640 is a wasteful number, since it uses less digits than its factorization.

395869640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896752 (or 9896748 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 395869640 is about 19896.4730542878. The cubic root of 395869640 is about 734.2614575388.

The spelling of 395869640 in words is "three hundred ninety-five million, eight hundred sixty-nine thousand, six hundred forty".