5638947 has 8 divisors (see below), whose sum is σ = 7537344. Its totient is φ = 3749928.

The previous prime is 5638939. The next prime is 5638949. The reversal of 5638947 is 7498365.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5638947 - 2³ = 5638939 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 5638899 and 5638908.

It is not an unprimeable number, because it can be changed into a prime (5638949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793 + ... + 3450.

It is an arithmetic number, because the mean of its divisors is an integer number (942168).

Almost surely, 2^5638947 is an apocalyptic number.

5638947 is a deficient number, since it is larger than the sum of its proper divisors (1898397).

5638947 is a wasteful number, since it uses less digits than its factorization.

5638947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689.

The product of its digits is 181440, while the sum is 42.

The square root of 5638947 is about 2374.6467105656. The cubic root of 5638947 is about 177.9915305485.

The spelling of 5638947 in words is "five million, six hundred thirty-eight thousand, nine hundred forty-seven".