399275444 has 6 divisors (see below), whose sum is σ = 698732034. Its totient is φ = 199637720.

The previous prime is 399275441. The next prime is 399275453. The reversal of 399275444 is 444572993.

It can be written as a sum of positive squares in only one way, i.e., 296252944 + 103022500 = 17212^2 + 10150^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399275441) 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 as a sum of consecutive naturals, namely, 49909427 + ... + 49909434.

It is an arithmetic number, because the mean of its divisors is an integer number (116455339).

Almost surely, 2^399275444 is an apocalyptic number.

It is an amenable number.

399275444 is a deficient number, since it is larger than the sum of its proper divisors (299456590).

399275444 is a wasteful number, since it uses less digits than its factorization.

399275444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99818865 (or 99818863 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 399275444 is about 19981.8778897280. The cubic root of 399275444 is about 736.3611496519.

The spelling of 399275444 in words is "three hundred ninety-nine million, two hundred seventy-five thousand, four hundred forty-four".