395215680 has 56 divisors (see below), whose sum is σ = 1254812832. Its totient is φ = 105390592.

The previous prime is 395215673. The next prime is 395215697. The reversal of 395215680 is 86512593.

It is a congruent number.

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, 204882 + ... + 206801.

It is an arithmetic number, because the mean of its divisors is an integer number (22407372).

Almost surely, 2^395215680 is an apocalyptic number.

395215680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

395215680 is an abundant number, since it is smaller than the sum of its proper divisors (859597152).

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

395215680 is a wasteful number, since it uses less digits than its factorization.

395215680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411703 (or 411693 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 395215680 is about 19880.0321931329. The cubic root of 395215680 is about 733.8569116747.

The spelling of 395215680 in words is "three hundred ninety-five million, two hundred fifteen thousand, six hundred eighty".