5644668 has 12 divisors (see below), whose sum is σ = 13170920. Its totient is φ = 1881552.

The previous prime is 5644657. The next prime is 5644673. The reversal of 5644668 is 8664465.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235183 + ... + 235206.

Almost surely, 2^5644668 is an apocalyptic number.

It is an amenable number.

5644668 is an abundant number, since it is smaller than the sum of its proper divisors (7526252).

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

5644668 is a wasteful number, since it uses less digits than its factorization.

5644668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470396 (or 470394 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 5644668 is about 2375.8510054294. The cubic root of 5644668 is about 178.0517040390.

The spelling of 5644668 in words is "five million, six hundred forty-four thousand, six hundred sixty-eight".