565981728 has 96 divisors (see below), whose sum is σ = 1684267200. Its totient is φ = 164975616.

The previous prime is 565981681. The next prime is 565981739. The reversal of 565981728 is 827189565.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11778 + ... + 35646.

It is an arithmetic number, because the mean of its divisors is an integer number (17544450).

Almost surely, 2^565981728 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 565981728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842133600).

565981728 is an abundant number, since it is smaller than the sum of its proper divisors (1118285472).

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

565981728 is a wasteful number, since it uses less digits than its factorization.

565981728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23914 (or 23906 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 51.

The square root of 565981728 is about 23790.3704889184. The cubic root of 565981728 is about 827.1814824249.

The spelling of 565981728 in words is "five hundred sixty-five million, nine hundred eighty-one thousand, seven hundred twenty-eight".