28051669008 has 320 divisors, whose sum is σ = 93444019200. Its totient is φ = 7967600640.

The previous prime is 28051669001. The next prime is 28051669021. The reversal of 28051669008 is 80096615082.

It is a super-2 number, since 2×28051669008² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28051669001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8756335 + ... + 8759537.

It is an arithmetic number, because the mean of its divisors is an integer number (292012560).

Almost surely, 2^28051669008 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 28051669008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46722009600).

28051669008 is an abundant number, since it is smaller than the sum of its proper divisors (65392350192).

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

28051669008 is a wasteful number, since it uses less digits than its factorization.

28051669008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 28051669008 in words is "twenty-eight billion, fifty-one million, six hundred sixty-nine thousand, eight".