28506580724 has 12 divisors (see below), whose sum is σ = 49889273700. Its totient is φ = 14252502528.

The previous prime is 28506580723. The next prime is 28506580741. The reversal of 28506580724 is 42708560582.

It can be written as a sum of positive squares in 2 ways, for example, as 26157239824 + 2349340900 = 161732^2 + 48470^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28506580721) 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, 111419 + ... + 263490.

It is an arithmetic number, because the mean of its divisors is an integer number (4157439475).

Almost surely, 2^28506580724 is an apocalyptic number.

It is an amenable number.

28506580724 is a deficient number, since it is larger than the sum of its proper divisors (21382692976).

28506580724 is a wasteful number, since it uses less digits than its factorization.

28506580724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393922 (or 393920 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 28506580724 in words is "twenty-eight billion, five hundred six million, five hundred eighty thousand, seven hundred twenty-four".