5638985 has 32 divisors (see below), whose sum is σ = 8076672. Its totient is φ = 3732480.

The previous prime is 5638967. The next prime is 5639003. The reversal of 5638985 is 5898365.

It is an interprime number because it is at equal distance from previous prime (5638967) and next prime (5639003).

It is not a de Polignac number, because 5638985 - 2¹⁴ = 5622601 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34514 + ... + 34676.

It is an arithmetic number, because the mean of its divisors is an integer number (252396).

Almost surely, 2^5638985 is an apocalyptic number.

5638985 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5638985 is a deficient number, since it is larger than the sum of its proper divisors (2437687).

5638985 is a wasteful number, since it uses less digits than its factorization.

5638985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233.

The product of its digits is 259200, while the sum is 44.

The square root of 5638985 is about 2374.6547117423. The cubic root of 5638985 is about 177.9919303668.

The spelling of 5638985 in words is "five million, six hundred thirty-eight thousand, nine hundred eighty-five".