28551685328 has 10 divisors (see below), whose sum is σ = 55318890354. Its totient is φ = 14275842656.

The previous prime is 28551685297. The next prime is 28551685343. The reversal of 28551685328 is 82358615582.

It can be written as a sum of positive squares in only one way, i.e., 25289904784 + 3261780544 = 159028^2 + 57112^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28551685328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 892240151 + ... + 892240182.

Almost surely, 2^28551685328 is an apocalyptic number.

It is an amenable number.

28551685328 is a deficient number, since it is larger than the sum of its proper divisors (26767205026).

28551685328 is a wasteful number, since it uses less digits than its factorization.

28551685328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784480341 (or 1784480335 counting only the distinct ones).

The product of its digits is 4608000, while the sum is 53.

The spelling of 28551685328 in words is "twenty-eight billion, five hundred fifty-one million, six hundred eighty-five thousand, three hundred twenty-eight".