3620565844 has 48 divisors (see below), whose sum is σ = 7426298880. Its totient is φ = 1512080640.

The previous prime is 3620565827. The next prime is 3620565863. The reversal of 3620565844 is 4485650263.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3620565844.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639389 + ... + 1641595.

It is an arithmetic number, because the mean of its divisors is an integer number (154714560).

Almost surely, 2^3620565844 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 3620565844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3713149440).

3620565844 is an abundant number, since it is smaller than the sum of its proper divisors (3805733036).

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

3620565844 is a wasteful number, since it uses less digits than its factorization.

3620565844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688 (or 3686 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The square root of 3620565844 is about 60171.1379649745. The cubic root of 3620565844 is about 1535.5318063813.

It can be divided in two parts, 3620565 and 844, that added together give a square (3621409 = 1903²).

The spelling of 3620565844 in words is "three billion, six hundred twenty million, five hundred sixty-five thousand, eight hundred forty-four".