5638812 has 48 divisors (see below), whose sum is σ = 13749792. Its totient is φ = 1797120.

The previous prime is 5638811. The next prime is 5638817. The reversal of 5638812 is 2188365.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35838 + ... + 35994.

It is an arithmetic number, because the mean of its divisors is an integer number (286454).

Almost surely, 2^5638812 is an apocalyptic number.

It is an amenable number.

5638812 is an abundant number, since it is smaller than the sum of its proper divisors (8110980).

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

5638812 is a wasteful number, since it uses less digits than its factorization.

5638812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 276 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 5638812 is about 2374.6182851145. The cubic root of 5638812 is about 177.9901101268.

The spelling of 5638812 in words is "five million, six hundred thirty-eight thousand, eight hundred twelve".