28628636928 has 72 divisors (see below), whose sum is σ = 78253297248. Its totient is φ = 9284954112.

The previous prime is 28628636873. The next prime is 28628636929. The reversal of 28628636928 is 82963682682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28628636929) 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, 475326 + ... + 532157.

Almost surely, 2^28628636928 is an apocalyptic number.

It is an amenable number.

28628636928 is an abundant number, since it is smaller than the sum of its proper divisors (49624660320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28628636928 is a wasteful number, since it uses less digits than its factorization.

28628636928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007539 (or 1007525 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 60.

The spelling of 28628636928 in words is "twenty-eight billion, six hundred twenty-eight million, six hundred thirty-six thousand, nine hundred twenty-eight".