3605643 has 12 divisors (see below), whose sum is σ = 5307120. Its totient is φ = 2358096.

The previous prime is 3605633. The next prime is 3605647. The reversal of 3605643 is 3465063.

It is not a de Polignac number, because 3605643 - 2⁸ = 3605387 is a prime.

It is a super-2 number, since 2×3605643² = 26001322886898, which contains 22 as substring.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3605647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3303 + ... + 4256.

It is an arithmetic number, because the mean of its divisors is an integer number (442260).

Almost surely, 2^3605643 is an apocalyptic number.

3605643 is a deficient number, since it is larger than the sum of its proper divisors (1701477).

3605643 is a wasteful number, since it uses less digits than its factorization.

3605643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7618 (or 7615 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 3605643 is about 1898.8530748849. The cubic root of 3605643 is about 153.3419240093.

The spelling of 3605643 in words is "three million, six hundred five thousand, six hundred forty-three".