5644647 has 32 divisors (see below), whose sum is σ = 8856000. Its totient is φ = 3592512.

The previous prime is 5644643. The next prime is 5644657. The reversal of 5644647 is 7464465.

5644647 is a `hidden beast` number, since 5 + 6 + 4 + 4 + 647 = 666.

It is not a de Polignac number, because 5644647 - 2² = 5644643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644643) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 63379 + ... + 63467.

It is an arithmetic number, because the mean of its divisors is an integer number (276750).

Almost surely, 2^5644647 is an apocalyptic number.

5644647 is a deficient number, since it is larger than the sum of its proper divisors (3211353).

5644647 is an frugal number, since it uses more digits than its factorization.

5644647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 121 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 5644647 is about 2375.8465859563. The cubic root of 5644647 is about 178.0514832353.

The spelling of 5644647 in words is "five million, six hundred forty-four thousand, six hundred forty-seven".