28028707512 has 32 divisors (see below), whose sum is σ = 75461905680. Its totient is φ = 8624217600.

The previous prime is 28028707457. The next prime is 28028707523. The reversal of 28028707512 is 21570782082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44917489 + ... + 44918112.

Almost surely, 2^28028707512 is an apocalyptic number.

It is an amenable number.

28028707512 is an abundant number, since it is smaller than the sum of its proper divisors (47433198168).

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

28028707512 is a wasteful number, since it uses less digits than its factorization.

28028707512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89835623 (or 89835619 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 42.

The spelling of 28028707512 in words is "twenty-eight billion, twenty-eight million, seven hundred seven thousand, five hundred twelve".