5638427 has 4 divisors (see below), whose sum is σ = 5883600. Its totient is φ = 5393256.

The previous prime is 5638411. The next prime is 5638429. The reversal of 5638427 is 7248365.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7248365 = 5 ⋅1449673.

It is a cyclic number.

It is not a de Polignac number, because 5638427 - 2⁴ = 5638411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5638429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122552 + ... + 122597.

It is an arithmetic number, because the mean of its divisors is an integer number (1470900).

Almost surely, 2^5638427 is an apocalyptic number.

5638427 is a deficient number, since it is larger than the sum of its proper divisors (245173).

5638427 is a wasteful number, since it uses less digits than its factorization.

5638427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245172.

The product of its digits is 40320, while the sum is 35.

The square root of 5638427 is about 2374.5372180701. The cubic root of 5638427 is about 177.9860591699.

It can be divided in two parts, 56 and 38427, that added together give a palindrome (38483).

The spelling of 5638427 in words is "five million, six hundred thirty-eight thousand, four hundred twenty-seven".