3644385 has 16 divisors (see below), whose sum is σ = 5873280. Its totient is φ = 1929600.

The previous prime is 3644357. The next prime is 3644411. The reversal of 3644385 is 5834463.

It is not a de Polignac number, because 3644385 - 2⁶ = 3644321 is a prime.

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, 1461 + ... + 3069.

It is an arithmetic number, because the mean of its divisors is an integer number (367080).

Almost surely, 2^3644385 is an apocalyptic number.

It is an amenable number.

3644385 is a deficient number, since it is larger than the sum of its proper divisors (2228895).

3644385 is a wasteful number, since it uses less digits than its factorization.

3644385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its digits is 34560, while the sum is 33.

The square root of 3644385 is about 1909.0272391980. The cubic root of 3644385 is about 153.8891792803.

The spelling of 3644385 in words is "three million, six hundred forty-four thousand, three hundred eighty-five".