4399636 has 12 divisors (see below), whose sum is σ = 7845012. Its totient is φ = 2158208.

The previous prime is 4399627. The next prime is 4399639. The reversal of 4399636 is 6369934.

It can be written as a sum of positive squares in 2 ways, for example, as 2268036 + 2131600 = 1506^2 + 1460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4399639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10165 + ... + 10588.

It is an arithmetic number, because the mean of its divisors is an integer number (653751).

Almost surely, 2^4399636 is an apocalyptic number.

It is an amenable number.

4399636 is a deficient number, since it is larger than the sum of its proper divisors (3445376).

4399636 is a wasteful number, since it uses less digits than its factorization.

4399636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20810 (or 20808 counting only the distinct ones).

The product of its digits is 104976, while the sum is 40.

The square root of 4399636 is about 2097.5309294501. The cubic root of 4399636 is about 163.8597353146.

The spelling of 4399636 in words is "four million, three hundred ninety-nine thousand, six hundred thirty-six".