399256346 has 16 divisors (see below), whose sum is σ = 614110248. Its totient is φ = 194611200.

The previous prime is 399256343. The next prime is 399256357. The reversal of 399256346 is 643652993.

It can be written as a sum of positive squares in 4 ways, for example, as 215355625 + 183900721 = 14675^2 + 13561^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 399256346.

It is not an unprimeable number, because it can be changed into a prime (399256343) 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, 695 + ... + 28266.

Almost surely, 2^399256346 is an apocalyptic number.

399256346 is a deficient number, since it is larger than the sum of its proper divisors (214853902).

399256346 is a wasteful number, since it uses less digits than its factorization.

399256346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29137.

The product of its digits is 1049760, while the sum is 47.

The square root of 399256346 is about 19981.4000010009. The cubic root of 399256346 is about 736.3494090105.

The spelling of 399256346 in words is "three hundred ninety-nine million, two hundred fifty-six thousand, three hundred forty-six".