3643385 has 8 divisors (see below), whose sum is σ = 4382856. Its totient is φ = 2907520.

The previous prime is 3643369. The next prime is 3643403. The reversal of 3643385 is 5833463.

It can be written as a sum of positive squares in 4 ways, for example, as 243049 + 3400336 = 493^2 + 1844^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3643385 - 2⁴ = 3643369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2495 + ... + 3675.

It is an arithmetic number, because the mean of its divisors is an integer number (547857).

Almost surely, 2^3643385 is an apocalyptic number.

It is an amenable number.

3643385 is a deficient number, since it is larger than the sum of its proper divisors (739471).

3643385 is a wasteful number, since it uses less digits than its factorization.

3643385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803.

The product of its digits is 25920, while the sum is 32.

The square root of 3643385 is about 1908.7653077317. The cubic root of 3643385 is about 153.8751025333.

The spelling of 3643385 in words is "three million, six hundred forty-three thousand, three hundred eighty-five".