3644445 has 32 divisors (see below), whose sum is σ = 6785280. Its totient is φ = 1635840.

The previous prime is 3644437. The next prime is 3644479. The reversal of 3644445 is 5444463.

It is not a de Polignac number, because 3644445 - 2³ = 3644437 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6121 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (212040).

Almost surely, 2^3644445 is an apocalyptic number.

3644445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3644445 is a deficient number, since it is larger than the sum of its proper divisors (3140835).

3644445 is a wasteful number, since it uses less digits than its factorization.

3644445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645.

The product of its digits is 23040, while the sum is 30.

The square root of 3644445 is about 1909.0429539432. The cubic root of 3644445 is about 153.8900238032.

The spelling of 3644445 in words is "three million, six hundred forty-four thousand, four hundred forty-five".