2585736728 has 32 divisors (see below), whose sum is σ = 5062037760. Its totient is φ = 1235926560.

The previous prime is 2585736721. The next prime is 2585736739. The reversal of 2585736728 is 8276375852.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2585736728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585736721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433301 + ... + 439227.

It is an arithmetic number, because the mean of its divisors is an integer number (158188680).

Almost surely, 2^2585736728 is an apocalyptic number.

It is an amenable number.

2585736728 is a deficient number, since it is larger than the sum of its proper divisors (2476301032).

2585736728 is a wasteful number, since it uses less digits than its factorization.

2585736728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327 (or 8323 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The square root of 2585736728 is about 50850.1399014791. The cubic root of 2585736728 is about 1372.5497701822.

The spelling of 2585736728 in words is "two billion, five hundred eighty-five million, seven hundred thirty-six thousand, seven hundred twenty-eight".