4399424 has 28 divisors (see below), whose sum is σ = 8901684. Its totient is φ = 2156544.

The previous prime is 4399399. The next prime is 4399457. The reversal of 4399424 is 4249934.

It can be written as a sum of positive squares in 2 ways, for example, as 4000000 + 399424 = 2000^2 + 632^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2744 + ... + 4040.

Almost surely, 2^4399424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4399424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4450842).

4399424 is an abundant number, since it is smaller than the sum of its proper divisors (4502260).

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

4399424 is a wasteful number, since it uses less digits than its factorization.

4399424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1352 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 4399424 is about 2097.4803932337. The cubic root of 4399424 is about 163.8571033679.

It can be divided in two parts, 4 and 399424, that multiplied together give a square (1597696 = 1264²).

The spelling of 4399424 in words is "four million, three hundred ninety-nine thousand, four hundred twenty-four".