28008117806 has 8 divisors (see below), whose sum is σ = 42332880744. Its totient is φ = 13897157560.

The previous prime is 28008117791. The next prime is 28008117821. The reversal of 28008117806 is 60871180082.

It is an interprime number because it is at equal distance from previous prime (28008117791) and next prime (28008117821).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53450345 + ... + 53450868.

It is an arithmetic number, because the mean of its divisors is an integer number (5291610093).

Almost surely, 2^28008117806 is an apocalyptic number.

28008117806 is a deficient number, since it is larger than the sum of its proper divisors (14324762938).

28008117806 is a wasteful number, since it uses less digits than its factorization.

28008117806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106901346.

The product of its (nonzero) digits is 43008, while the sum is 41.

Adding to 28008117806 its reverse (60871180082), we get a palindrome (88879297888).

The spelling of 28008117806 in words is "twenty-eight billion, eight million, one hundred seventeen thousand, eight hundred six".