28940705208 has 384 divisors, whose sum is σ = 89476358400. Its totient is φ = 8404881408.

The previous prime is 28940705159. The next prime is 28940705231. The reversal of 28940705208 is 80250704982.

28940705208 is a `hidden beast` number, since 2 + 89 + 40 + 7 + 0 + 520 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 102263835 + ... + 102264117.

It is an arithmetic number, because the mean of its divisors is an integer number (233011350).

Almost surely, 2^28940705208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28940705208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44738179200).

28940705208 is an abundant number, since it is smaller than the sum of its proper divisors (60535653192).

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

28940705208 is a wasteful number, since it uses less digits than its factorization.

28940705208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 28940705208 in words is "twenty-eight billion, nine hundred forty million, seven hundred five thousand, two hundred eight".