28006719408 has 200 divisors, whose sum is σ = 83182176000. Its totient is φ = 9092393856.

The previous prime is 28006719407. The next prime is 28006719421. The reversal of 28006719408 is 80491760082.

It is not an unprimeable number, because it can be changed into a prime (28006719407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33380653 + ... + 33381491.

It is an arithmetic number, because the mean of its divisors is an integer number (415910880).

Almost surely, 2^28006719408 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 28006719408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41591088000).

28006719408 is an abundant number, since it is smaller than the sum of its proper divisors (55175456592).

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

28006719408 is a wasteful number, since it uses less digits than its factorization.

28006719408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 28006719408 in words is "twenty-eight billion, six million, seven hundred nineteen thousand, four hundred eight".