3644424 has 72 divisors (see below), whose sum is σ = 11492910. Its totient is φ = 1040256.

The previous prime is 3644423. The next prime is 3644437. The reversal of 3644424 is 4244463.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 1483524 = 1470^2 + 1218^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (3644423) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3012 + ... + 4044.

Almost surely, 2^3644424 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 3644424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5746455).

3644424 is an abundant number, since it is smaller than the sum of its proper divisors (7848486).

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

3644424 is a wasteful number, since it uses less digits than its factorization.

3644424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1045 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 3644424 is about 1909.0374537971. The cubic root of 3644424 is about 153.8897282212.

Adding to 3644424 its reverse (4244463), we get a palindrome (7888887).

The spelling of 3644424 in words is "three million, six hundred forty-four thousand, four hundred twenty-four".