395401979 has 16 divisors (see below), whose sum is σ = 469048320. Its totient is φ = 326124960.

The previous prime is 395401967. The next prime is 395401987. The reversal of 395401979 is 979104593.

It is a de Polignac number, because none of the positive numbers 2^k-395401979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (395401949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60002 + ... + 66264.

It is an arithmetic number, because the mean of its divisors is an integer number (29315520).

Almost surely, 2^395401979 is an apocalyptic number.

395401979 is a deficient number, since it is larger than the sum of its proper divisors (73646341).

395401979 is a wasteful number, since it uses less digits than its factorization.

395401979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 395401979 is about 19884.7172220276. The cubic root of 395401979 is about 733.9722034332.

The spelling of 395401979 in words is "three hundred ninety-five million, four hundred one thousand, nine hundred seventy-nine".