399047685 has 32 divisors (see below), whose sum is σ = 664813440. Its totient is φ = 204142848.

The previous prime is 399047617. The next prime is 399047687. The reversal of 399047685 is 586740993.

It is not a de Polignac number, because 399047685 - 2¹¹ = 399045637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399047687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65374 + ... + 71216.

It is an arithmetic number, because the mean of its divisors is an integer number (20775420).

Almost surely, 2^399047685 is an apocalyptic number.

It is an amenable number.

399047685 is a deficient number, since it is larger than the sum of its proper divisors (265765755).

399047685 is a wasteful number, since it uses less digits than its factorization.

399047685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 399047685 is about 19976.1779377337. The cubic root of 399047685 is about 736.2211086675.

The spelling of 399047685 in words is "three hundred ninety-nine million, forty-seven thousand, six hundred eighty-five".