3639445 has 16 divisors (see below), whose sum is σ = 4727808. Its totient is φ = 2679040.

The previous prime is 3639421. The next prime is 3639473. The reversal of 3639445 is 5449363.

It is a happy number.

3639445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3639445 - 2¹⁹ = 3115157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3639445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3540 + ... + 4450.

It is an arithmetic number, because the mean of its divisors is an integer number (295488).

Almost surely, 2^3639445 is an apocalyptic number.

It is an amenable number.

3639445 is a deficient number, since it is larger than the sum of its proper divisors (1088363).

3639445 is a wasteful number, since it uses less digits than its factorization.

3639445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its digits is 38880, while the sum is 34.

The square root of 3639445 is about 1907.7329477681. The cubic root of 3639445 is about 153.8196150697.

The spelling of 3639445 in words is "three million, six hundred thirty-nine thousand, four hundred forty-five".