3645678 has 16 divisors (see below), whose sum is σ = 7310160. Its totient is φ = 1212096.

The previous prime is 3645659. The next prime is 3645683. The reversal of 3645678 is 8765463.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3826 + ... + 4682.

It is an arithmetic number, because the mean of its divisors is an integer number (456885).

Almost surely, 2^3645678 is an apocalyptic number.

3645678 is an abundant number, since it is smaller than the sum of its proper divisors (3664482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3645678 is a wasteful number, since it uses less digits than its factorization.

3645678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571.

The product of its digits is 120960, while the sum is 39.

The square root of 3645678 is about 1909.3658633169. The cubic root of 3645678 is about 153.9073766973.

The spelling of 3645678 in words is "three million, six hundred forty-five thousand, six hundred seventy-eight".