5639724 has 18 divisors (see below), whose sum is σ = 14256060. Its totient is φ = 1879896.

The previous prime is 5639723. The next prime is 5639729. The reversal of 5639724 is 4279365.

5639724 is a `hidden beast` number, since 563 + 97 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 156659 = 5639724 / (5 + 6 + 3 + 9 + 7 + 2 + 4).

It is a d-powerful number, because it can be written as 5³ + 6² + 3³ + 9⁷ + 7⁷ + 2¹⁵ + 4⁴ .

It is not an unprimeable number, because it can be changed into a prime (5639723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78294 + ... + 78365.

Almost surely, 2^5639724 is an apocalyptic number.

It is an amenable number.

5639724 is an abundant number, since it is smaller than the sum of its proper divisors (8616336).

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

5639724 is a wasteful number, since it uses less digits than its factorization.

5639724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156669 (or 156664 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 5639724 is about 2374.8103082141. The cubic root of 5639724 is about 177.9997054239. Note that the first 3 decimals are identical.

The spelling of 5639724 in words is "five million, six hundred thirty-nine thousand, seven hundred twenty-four".