2564039728 has 20 divisors (see below), whose sum is σ = 4990111168. Its totient is φ = 1276269120.

The previous prime is 2564039693. The next prime is 2564039761. The reversal of 2564039728 is 8279304652.

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 3 ways as a sum of consecutive naturals, for example, 355743 + ... + 362878.

Almost surely, 2^2564039728 is an apocalyptic number.

It is an amenable number.

2564039728 is a deficient number, since it is larger than the sum of its proper divisors (2426071440).

2564039728 is a wasteful number, since it uses less digits than its factorization.

2564039728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718852 (or 718846 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 2564039728 is about 50636.3478935833. The cubic root of 2564039728 is about 1368.6999456046.

The spelling of 2564039728 in words is "two billion, five hundred sixty-four million, thirty-nine thousand, seven hundred twenty-eight".