3644665 has 8 divisors (see below), whose sum is σ = 4429440. Its totient is φ = 2878512.

The previous prime is 3644659. The next prime is 3644699. The reversal of 3644665 is 5664463.

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 3644665 - 2³ = 3644657 is a prime.

It is a super-3 number, since 3×3644665³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3644665.

It is a congruent 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, 4219 + ... + 5008.

It is an arithmetic number, because the mean of its divisors is an integer number (553680).

Almost surely, 2^3644665 is an apocalyptic number.

It is an amenable number.

3644665 is a deficient number, since it is larger than the sum of its proper divisors (784775).

3644665 is an equidigital number, since it uses as much as digits as its factorization.

3644665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311.

The product of its digits is 51840, while the sum is 34.

The square root of 3644665 is about 1909.1005735686. The cubic root of 3644665 is about 153.8931203080.

The spelling of 3644665 in words is "three million, six hundred forty-four thousand, six hundred sixty-five".