28211989760 has 72 divisors (see below), whose sum is σ = 67607262240. Its totient is φ = 11279665152.

The previous prime is 28211989723. The next prime is 28211989781. The reversal of 28211989760 is 6798911282.

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, 4168139 + ... + 4174901.

Almost surely, 2^28211989760 is an apocalyptic number.

28211989760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28211989760 is an abundant number, since it is smaller than the sum of its proper divisors (39395272480).

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

28211989760 is an equidigital number, since it uses as much as digits as its factorization.

28211989760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10043 (or 10029 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 28211989760 in words is "twenty-eight billion, two hundred eleven million, nine hundred eighty-nine thousand, seven hundred sixty".