3644885 has 16 divisors (see below), whose sum is σ = 4679856. Its totient is φ = 2715648.

The previous prime is 3644873. The next prime is 3644899. The reversal of 3644885 is 5884463.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 192721 + 3452164 = 439^2 + 1858^2 .

It is not a de Polignac number, because 3644885 - 2⁸ = 3644629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11489 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (292491).

Almost surely, 2^3644885 is an apocalyptic number.

It is an amenable number.

3644885 is a deficient number, since it is larger than the sum of its proper divisors (1034971).

3644885 is a wasteful number, since it uses less digits than its factorization.

3644885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472.

The product of its digits is 92160, while the sum is 38.

The square root of 3644885 is about 1909.1581914551. The cubic root of 3644885 is about 153.8962166881.

The spelling of 3644885 in words is "three million, six hundred forty-four thousand, eight hundred eighty-five".