28308613328 has 10 divisors (see below), whose sum is σ = 54847938354. Its totient is φ = 14154306656.

The previous prime is 28308613327. The next prime is 28308613331. The reversal of 28308613328 is 82331680382.

It can be written as a sum of positive squares in only one way, i.e., 28146101824 + 162511504 = 167768^2 + 12748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28308613327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 884644151 + ... + 884644182.

Almost surely, 2^28308613328 is an apocalyptic number.

It is an amenable number.

28308613328 is a deficient number, since it is larger than the sum of its proper divisors (26539325026).

28308613328 is a wasteful number, since it uses less digits than its factorization.

28308613328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769288341 (or 1769288335 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 28308613328 in words is "twenty-eight billion, three hundred eight million, six hundred thirteen thousand, three hundred twenty-eight".