4399626 has 64 divisors (see below), whose sum is σ = 11197440. Its totient is φ = 1119360.

The previous prime is 4399609. The next prime is 4399627. The reversal of 4399626 is 6269934.

4399626 = 200² + 201² + ... + 276².

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4399627) 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 31 ways as a sum of consecutive naturals, for example, 41065 + ... + 41171.

It is an arithmetic number, because the mean of its divisors is an integer number (174960).

Almost surely, 2^4399626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4399626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5598720).

4399626 is an abundant number, since it is smaller than the sum of its proper divisors (6797814).

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

4399626 is a wasteful number, since it uses less digits than its factorization.

4399626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

The product of its digits is 69984, while the sum is 39.

The square root of 4399626 is about 2097.5285456937. The cubic root of 4399626 is about 163.8596111680.

The spelling of 4399626 in words is "four million, three hundred ninety-nine thousand, six hundred twenty-six".