3643646 has 8 divisors (see below), whose sum is σ = 5502600. Its totient is φ = 1809448.

The previous prime is 3643639. The next prime is 3643657. The reversal of 3643646 is 6463463.

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

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁵ + 6⁷ + 4⁵ + 3⁷ + 6⁸ + 4⁵ + 6⁸ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5816 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (687825).

Almost surely, 2^3643646 is an apocalyptic number.

3643646 is a deficient number, since it is larger than the sum of its proper divisors (1858954).

3643646 is a wasteful number, since it uses less digits than its factorization.

3643646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12378.

The product of its digits is 31104, while the sum is 32.

The square root of 3643646 is about 1908.8336753107. The cubic root of 3643646 is about 153.8787768126.

The spelling of 3643646 in words is "three million, six hundred forty-three thousand, six hundred forty-six".