28991470676 has 24 divisors (see below), whose sum is σ = 61393703616. Its totient is φ = 11694038400.

The previous prime is 28991470649. The next prime is 28991470687. The reversal of 28991470676 is 67607419982.

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, 30452750 + ... + 30453701.

It is an arithmetic number, because the mean of its divisors is an integer number (2558070984).

Almost surely, 2^28991470676 is an apocalyptic number.

It is an amenable number.

28991470676 is an abundant number, since it is smaller than the sum of its proper divisors (32402232940).

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

28991470676 is a wasteful number, since it uses less digits than its factorization.

28991470676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60906479 (or 60906477 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 28991470676 in words is "twenty-eight billion, nine hundred ninety-one million, four hundred seventy thousand, six hundred seventy-six".