5638745 has 16 divisors (see below), whose sum is σ = 7984128. Its totient is φ = 3741120.

The previous prime is 5638709. The next prime is 5638751. The reversal of 5638745 is 5478365.

It is not a de Polignac number, because 5638745 - 2⁸ = 5638489 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5638699 and 5638708.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1514 + ... + 3683.

It is an arithmetic number, because the mean of its divisors is an integer number (499008).

Almost surely, 2^5638745 is an apocalyptic number.

It is an amenable number.

5638745 is a deficient number, since it is larger than the sum of its proper divisors (2345383).

5638745 is a wasteful number, since it uses less digits than its factorization.

5638745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240.

The product of its digits is 100800, while the sum is 38.

The square root of 5638745 is about 2374.6041775420. The cubic root of 5638745 is about 177.9894051683.

The spelling of 5638745 in words is "five million, six hundred thirty-eight thousand, seven hundred forty-five".