28013102208 has 448 divisors, whose sum is σ = 103013064000. Its totient is φ = 7385831424.

The previous prime is 28013102207. The next prime is 28013102239. The reversal of 28013102208 is 80220131082.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28013102203) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8489743 + ... + 8493041.

It is an arithmetic number, because the mean of its divisors is an integer number (229939875).

Almost surely, 2^28013102208 is an apocalyptic number.

28013102208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28013102208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51506532000).

28013102208 is an abundant number, since it is smaller than the sum of its proper divisors (74999961792).

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

28013102208 is an equidigital number, since it uses as much as digits as its factorization.

28013102208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The spelling of 28013102208 in words is "twenty-eight billion, thirteen million, one hundred two thousand, two hundred eight".