399794766 has 16 divisors (see below), whose sum is σ = 913816704. Its totient is φ = 114227064.

The previous prime is 399794749. The next prime is 399794767. The reversal of 399794766 is 667497993.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399794767) 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, 4759420 + ... + 4759503.

It is an arithmetic number, because the mean of its divisors is an integer number (57113544).

Almost surely, 2^399794766 is an apocalyptic number.

399794766 is an abundant number, since it is smaller than the sum of its proper divisors (514021938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399794766 is a wasteful number, since it uses less digits than its factorization.

399794766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9518935.

The product of its digits is 15431472, while the sum is 60.

The square root of 399794766 is about 19994.8684916906. The cubic root of 399794766 is about 736.6802634164.

The spelling of 399794766 in words is "three hundred ninety-nine million, seven hundred ninety-four thousand, seven hundred sixty-six".