28984935220 has 12 divisors (see below), whose sum is σ = 60868364004. Its totient is φ = 11593974080.

The previous prime is 28984935197. The next prime is 28984935229. The reversal of 28984935220 is 2253948982.

It can be written as a sum of positive squares in 2 ways, for example, as 21169668004 + 7815267216 = 145498^2 + 88404^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28984935229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724623361 + ... + 724623400.

It is an arithmetic number, because the mean of its divisors is an integer number (5072363667).

Almost surely, 2^28984935220 is an apocalyptic number.

28984935220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28984935220 is an abundant number, since it is smaller than the sum of its proper divisors (31883428784).

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

28984935220 is a wasteful number, since it uses less digits than its factorization.

28984935220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449246770 (or 1449246768 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 28984935220 in words is "twenty-eight billion, nine hundred eighty-four million, nine hundred thirty-five thousand, two hundred twenty".