3686540724 has 18 divisors (see below), whose sum is σ = 9318755810. Its totient is φ = 1228846896.

The previous prime is 3686540713. The next prime is 3686540747. The reversal of 3686540724 is 4270456863.

3686540724 is a `hidden beast` number, since 3 + 6 + 86 + 540 + 7 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2974611600 + 711929124 = 54540^2 + 26682^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 3686540724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51201919 + ... + 51201990.

Almost surely, 2^3686540724 is an apocalyptic number.

It is an amenable number.

3686540724 is an abundant number, since it is smaller than the sum of its proper divisors (5632215086).

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

3686540724 is a wasteful number, since it uses less digits than its factorization.

3686540724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102403919 (or 102403914 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The square root of 3686540724 is about 60716.8899401147. The cubic root of 3686540724 is about 1544.8026718793.

The spelling of 3686540724 in words is "three billion, six hundred eighty-six million, five hundred forty thousand, seven hundred twenty-four".