28008005008 has 20 divisors (see below), whose sum is σ = 54276112540. Its totient is φ = 14001266304.

The previous prime is 28008004987. The next prime is 28008005009. The reversal of 28008005008 is 80050080082.

It can be written as a sum of positive squares in 2 ways, for example, as 10507890064 + 17500114944 = 102508^2 + 132288^2 .

It is not an unprimeable number, because it can be changed into a prime (28008005009) 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, 85263 + ... + 251566.

It is an arithmetic number, because the mean of its divisors is an integer number (2713805627).

Almost surely, 2^28008005008 is an apocalyptic number.

It is an amenable number.

28008005008 is a deficient number, since it is larger than the sum of its proper divisors (26268107532).

28008005008 is a wasteful number, since it uses less digits than its factorization.

28008005008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342034 (or 342028 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The spelling of 28008005008 in words is "twenty-eight billion, eight million, five thousand, eight".