5638464 has 112 divisors (see below), whose sum is σ = 17922240. Its totient is φ = 1728000.

The previous prime is 5638433. The next prime is 5638489. The reversal of 5638464 is 4648365.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22339 + ... + 22589.

It is an arithmetic number, because the mean of its divisors is an integer number (160020).

Almost surely, 2^5638464 is an apocalyptic number.

5638464 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5638464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8961120).

5638464 is an abundant number, since it is smaller than the sum of its proper divisors (12283776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5638464 is a wasteful number, since it uses less digits than its factorization.

5638464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 269 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 5638464 is about 2374.5450090491. The cubic root of 5638464 is about 177.9864484907.

Subtracting from 5638464 its reverse (4648365), we obtain a palindrome (990099).

The spelling of 5638464 in words is "five million, six hundred thirty-eight thousand, four hundred sixty-four".