395949680 has 40 divisors (see below), whose sum is σ = 1052096352. Its totient is φ = 135753984.

The previous prime is 395949677. The next prime is 395949689. The reversal of 395949680 is 86949593.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×395949680² = 313552298184204800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395949689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352967 + ... + 354086.

Almost surely, 2^395949680 is an apocalyptic number.

It is an amenable number.

395949680 is an abundant number, since it is smaller than the sum of its proper divisors (656146672).

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

395949680 is a wasteful number, since it uses less digits than its factorization.

395949680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707073 (or 707067 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 395949680 is about 19898.4843643932. The cubic root of 395949680 is about 734.3109404331.

The spelling of 395949680 in words is "three hundred ninety-five million, nine hundred forty-nine thousand, six hundred eighty".