28288770653 has 24 divisors (see below), whose sum is σ = 34391236824. Its totient is φ = 23097191040.

The previous prime is 28288770647. The next prime is 28288770703. The reversal of 28288770653 is 35607788282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7817742724 + 20471027929 = 88418^2 + 143077^2 .

It is not a de Polignac number, because 28288770653 - 2¹⁰ = 28288769629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28288772653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184826 + ... + 301227.

It is an arithmetic number, because the mean of its divisors is an integer number (1432968201).

Almost surely, 2^28288770653 is an apocalyptic number.

It is an amenable number.

28288770653 is a deficient number, since it is larger than the sum of its proper divisors (6102466171).

28288770653 is a wasteful number, since it uses less digits than its factorization.

28288770653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486125 (or 486114 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 28288770653 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred seventy thousand, six hundred fifty-three".