28008305990 has 16 divisors (see below), whose sum is σ = 57617086752. Its totient is φ = 9602847744.

The previous prime is 28008305989. The next prime is 28008306013. The reversal of 28008305990 is 9950380082.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 200059259 + ... + 200059398.

It is an arithmetic number, because the mean of its divisors is an integer number (3601067922).

Almost surely, 2^28008305990 is an apocalyptic number.

28008305990 is an abundant number, since it is smaller than the sum of its proper divisors (29608780762).

28008305990 is a wasteful number, since it uses less digits than its factorization.

28008305990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400118671.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 28008305990 in words is "twenty-eight billion, eight million, three hundred five thousand, nine hundred ninety".