3644399 has 6 divisors (see below), whose sum is σ = 4005960. Its totient is φ = 3312980.

The previous prime is 3644357. The next prime is 3644411. The reversal of 3644399 is 9934463.

It is not a de Polignac number, because 3644399 - 2¹⁶ = 3578863 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644309) 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 in 5 ways as a sum of consecutive naturals, for example, 14939 + ... + 15180.

It is an arithmetic number, because the mean of its divisors is an integer number (667660).

Almost surely, 2^3644399 is an apocalyptic number.

3644399 is a deficient number, since it is larger than the sum of its proper divisors (361561).

3644399 is a wasteful number, since it uses less digits than its factorization.

3644399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30141 (or 30130 counting only the distinct ones).

The product of its digits is 69984, while the sum is 38.

The square root of 3644399 is about 1909.0309059835. The cubic root of 3644399 is about 153.8893763364.

Subtracting 3644399 from its reverse (9934463), we obtain a square (6290064 = 2508²).

The spelling of 3644399 in words is "three million, six hundred forty-four thousand, three hundred ninety-nine".