5639220 has 90 divisors (see below), whose sum is σ = 17995362. Its totient is φ = 1478304.

The previous prime is 5639213. The next prime is 5639243. The reversal of 5639220 is 229365.

5639220 is a `hidden beast` number, since 5 + 639 + 2 + 20 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4511376 + 1127844 = 2124^2 + 1062^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 95551 + ... + 95609.

Almost surely, 2^5639220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5639220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8997681).

5639220 is an abundant number, since it is smaller than the sum of its proper divisors (12356142).

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

5639220 is a wasteful number, since it uses less digits than its factorization.

5639220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 5639220 is about 2374.7041921048. The cubic root of 5639220 is about 177.9944028876.

The spelling of 5639220 in words is "five million, six hundred thirty-nine thousand, two hundred twenty".