399038266 has 32 divisors (see below), whose sum is σ = 705942720. Its totient is φ = 167184000.

The previous prime is 399038261. The next prime is 399038267. The reversal of 399038266 is 662830993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (399038261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2566 + ... + 28366.

It is an arithmetic number, because the mean of its divisors is an integer number (22060710).

Almost surely, 2^399038266 is an apocalyptic number.

399038266 is a deficient number, since it is larger than the sum of its proper divisors (306904454).

399038266 is a wasteful number, since it uses less digits than its factorization.

399038266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25870.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 399038266 is about 19975.9421805331. The cubic root of 399038266 is about 736.2153161090.

The spelling of 399038266 in words is "three hundred ninety-nine million, thirty-eight thousand, two hundred sixty-six".