395344257 has 16 divisors (see below), whose sum is σ = 657196032. Its totient is φ = 205373520.

The previous prime is 395344249. The next prime is 395344273. The reversal of 395344257 is 752443593.

It is not a de Polignac number, because 395344257 - 2³ = 395344249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (395344237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855493 + ... + 855954.

It is an arithmetic number, because the mean of its divisors is an integer number (41074752).

Almost surely, 2^395344257 is an apocalyptic number.

It is an amenable number.

395344257 is a deficient number, since it is larger than the sum of its proper divisors (261851775).

395344257 is a wasteful number, since it uses less digits than its factorization.

395344257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711468.

The product of its digits is 453600, while the sum is 42.

The square root of 395344257 is about 19883.2657528888. The cubic root of 395344257 is about 733.9364858534.

The spelling of 395344257 in words is "three hundred ninety-five million, three hundred forty-four thousand, two hundred fifty-seven".