5640724 has 12 divisors (see below), whose sum is σ = 10138324. Its totient is φ = 2744064.

The previous prime is 5640721. The next prime is 5640743. The reversal of 5640724 is 4270465.

It can be written as a sum of positive squares in 2 ways, for example, as 4243600 + 1397124 = 2060^2 + 1182^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 5640692 and 5640701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18909 + ... + 19204.

Almost surely, 2^5640724 is an apocalyptic number.

It is an amenable number.

5640724 is a deficient number, since it is larger than the sum of its proper divisors (4497600).

5640724 is a wasteful number, since it uses less digits than its factorization.

5640724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38154 (or 38152 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 5640724 is about 2375.0208420138. The cubic root of 5640724 is about 178.0102253941.

The spelling of 5640724 in words is "five million, six hundred forty thousand, seven hundred twenty-four".