5643918 has 84 divisors (see below), whose sum is σ = 14952240. Its totient is φ = 1592136.

The previous prime is 5643877. The next prime is 5643919. The reversal of 5643918 is 8193465.

5643918 is a `hidden beast` number, since 5 + 643 + 9 + 1 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643919) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 71403 + ... + 71481.

Almost surely, 2^5643918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5643918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7476120).

5643918 is an abundant number, since it is smaller than the sum of its proper divisors (9308322).

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

5643918 is an equidigital number, since it uses as much as digits as its factorization.

5643918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 91 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 5643918 is about 2375.6931620056. The cubic root of 5643918 is about 178.0438178537.

It can be divided in two parts, 5643 and 918, that added together give a 8-th power (6561 = 3⁸).

The spelling of 5643918 in words is "five million, six hundred forty-three thousand, nine hundred eighteen".