5686638 has 8 divisors (see below), whose sum is σ = 11373288. Its totient is φ = 1895544.

The previous prime is 5686633. The next prime is 5686649. The reversal of 5686638 is 8366865.

It is a sphenic number, since it is the product of 3 distinct primes.

5686638 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 5686638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5686631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 473881 + ... + 473892.

It is an arithmetic number, because the mean of its divisors is an integer number (1421661).

Almost surely, 2^5686638 is an apocalyptic number.

5686638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5686638 is a wasteful number, since it uses less digits than its factorization.

5686638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947778.

The product of its digits is 207360, while the sum is 42.

The square root of 5686638 is about 2384.6672723883. The cubic root of 5686638 is about 178.4919061996.

The spelling of 5686638 in words is "five million, six hundred eighty-six thousand, six hundred thirty-eight".