399395834 has 16 divisors (see below), whose sum is σ = 622708128. Its totient is φ = 191956752.

The previous prime is 399395833. The next prime is 399395873. The reversal of 399395834 is 438593993.

It is not an unprimeable number, because it can be changed into a prime (399395833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26372 + ... + 38655.

It is an arithmetic number, because the mean of its divisors is an integer number (38919258).

Almost surely, 2^399395834 is an apocalyptic number.

399395834 is a deficient number, since it is larger than the sum of its proper divisors (223312294).

399395834 is a wasteful number, since it uses less digits than its factorization.

399395834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65149.

The product of its digits is 3149280, while the sum is 53.

The square root of 399395834 is about 19984.8901423050. The cubic root of 399395834 is about 736.4351517071.

The spelling of 399395834 in words is "three hundred ninety-nine million, three hundred ninety-five thousand, eight hundred thirty-four".