399394011 has 16 divisors (see below), whose sum is σ = 557683200. Its totient is φ = 253767360.

The previous prime is 399394001. The next prime is 399394043. The reversal of 399394011 is 110493993.

It is not a de Polignac number, because 399394011 - 2¹¹ = 399391963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399394001) 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, 9090 + ... + 29688.

It is an arithmetic number, because the mean of its divisors is an integer number (34855200).

Almost surely, 2^399394011 is an apocalyptic number.

399394011 is a deficient number, since it is larger than the sum of its proper divisors (158289189).

399394011 is a wasteful number, since it uses less digits than its factorization.

399394011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20906.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 399394011 is about 19984.8445327953. The cubic root of 399394011 is about 736.4340312453.

The spelling of 399394011 in words is "three hundred ninety-nine million, three hundred ninety-four thousand, eleven".