3644945 has 8 divisors (see below), whose sum is σ = 4427136. Its totient is φ = 2880496.

The previous prime is 3644899. The next prime is 3644947. The reversal of 3644945 is 5494463.

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

It is a cyclic number.

It is not a de Polignac number, because 3644945 - 2¹⁰ = 3643921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3977 + ... + 4806.

It is an arithmetic number, because the mean of its divisors is an integer number (553392).

Almost surely, 2^3644945 is an apocalyptic number.

It is an amenable number.

3644945 is a deficient number, since it is larger than the sum of its proper divisors (782191).

3644945 is an equidigital number, since it uses as much as digits as its factorization.

3644945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8871.

The product of its digits is 51840, while the sum is 35.

The square root of 3644945 is about 1909.1739051223. The cubic root of 3644945 is about 153.8970611338.

The spelling of 3644945 in words is "three million, six hundred forty-four thousand, nine hundred forty-five".