5638239 has 12 divisors (see below), whose sum is σ = 8236800. Its totient is φ = 3716064.

The previous prime is 5638229. The next prime is 5638247. The reversal of 5638239 is 9328365.

It is not a de Polignac number, because 5638239 - 2⁴ = 5638223 is a prime.

It is a super-2 number, since 2×5638239² = 63579478042242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638219) 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 11 ways as a sum of consecutive naturals, for example, 2719 + ... + 4320.

It is an arithmetic number, because the mean of its divisors is an integer number (686400).

Almost surely, 2^5638239 is an apocalyptic number.

5638239 is a deficient number, since it is larger than the sum of its proper divisors (2598561).

5638239 is a wasteful number, since it uses less digits than its factorization.

5638239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134 (or 7131 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 5638239 is about 2374.4976310790. The cubic root of 5638239 is about 177.9840809734.

The spelling of 5638239 in words is "five million, six hundred thirty-eight thousand, two hundred thirty-nine".