5638728 has 16 divisors (see below), whose sum is σ = 14096880. Its totient is φ = 1879568.

The previous prime is 5638709. The next prime is 5638751. The reversal of 5638728 is 8278365.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117450 + ... + 117497.

It is an arithmetic number, because the mean of its divisors is an integer number (881055).

Almost surely, 2^5638728 is an apocalyptic number.

It is an amenable number.

5638728 is an abundant number, since it is smaller than the sum of its proper divisors (8458152).

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

5638728 is a wasteful number, since it uses less digits than its factorization.

5638728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234956 (or 234952 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 5638728 is about 2374.6005979954. The cubic root of 5638728 is about 177.9892262974.

The spelling of 5638728 in words is "five million, six hundred thirty-eight thousand, seven hundred twenty-eight".