5643985 has 8 divisors (see below), whose sum is σ = 6802560. Its totient is φ = 4495344.

The previous prime is 5643973. The next prime is 5644021. The reversal of 5643985 is 5893465.

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 5643985 - 2⁷ = 5643857 is a prime.

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, 1167 + ... + 3556.

It is an arithmetic number, because the mean of its divisors is an integer number (850320).

Almost surely, 2^5643985 is an apocalyptic number.

It is an amenable number.

5643985 is a deficient number, since it is larger than the sum of its proper divisors (1158575).

5643985 is a wasteful number, since it uses less digits than its factorization.

5643985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967.

The product of its digits is 129600, while the sum is 40.

The square root of 5643985 is about 2375.7072631113. The cubic root of 5643985 is about 178.0445223814.

The spelling of 5643985 in words is "five million, six hundred forty-three thousand, nine hundred eighty-five".