5639816 has 64 divisors (see below), whose sum is σ = 13332480. Its totient is φ = 2177280.

The previous prime is 5639813. The next prime is 5639831. The reversal of 5639816 is 6189365.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 5639816 = 4³ + 178³ = 82³ + 172³.

It is a self number, because there is not a number n which added to its sum of digits gives 5639816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5639813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44345 + ... + 44471.

It is an arithmetic number, because the mean of its divisors is an integer number (208320).

Almost surely, 2^5639816 is an apocalyptic number.

5639816 is a gapful number since it is divisible by the number (56) 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 5639816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6666240).

5639816 is an abundant number, since it is smaller than the sum of its proper divisors (7692664).

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

5639816 is a wasteful number, since it uses less digits than its factorization.

5639816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 210 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 5639816 is about 2374.8296781033. The cubic root of 5639816 is about 178.0006733131. Note that the first 3 decimals are identical.

The spelling of 5639816 in words is "five million, six hundred thirty-nine thousand, eight hundred sixteen".