5638399 has 4 divisors (see below), whose sum is σ = 6072136. Its totient is φ = 5204664.

The previous prime is 5638397. The next prime is 5638411. The reversal of 5638399 is 9938365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9938365 = 5 ⋅1987673.

It is a cyclic number.

It is not a de Polignac number, because 5638399 - 2¹ = 5638397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638397) 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, 216849 + ... + 216874.

It is an arithmetic number, because the mean of its divisors is an integer number (1518034).

Almost surely, 2^5638399 is an apocalyptic number.

5638399 is a deficient number, since it is larger than the sum of its proper divisors (433737).

5638399 is a wasteful number, since it uses less digits than its factorization.

5638399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433736.

The product of its digits is 174960, while the sum is 43.

The square root of 5638399 is about 2374.5313221771. The cubic root of 5638399 is about 177.9857645477.

The spelling of 5638399 in words is "five million, six hundred thirty-eight thousand, three hundred ninety-nine".