28211000830 has 32 divisors (see below), whose sum is σ = 50969533824. Its totient is φ = 11242304256.

The previous prime is 28211000827. The next prime is 28211000887. The reversal of 28211000830 is 3800011282.

It is a junction number, because it is equal to n+sod(n) for n = 28211000795 and 28211000804.

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 15 ways as a sum of consecutive naturals, for example, 4110762 + ... + 4117618.

It is an arithmetic number, because the mean of its divisors is an integer number (1592797932).

Almost surely, 2^28211000830 is an apocalyptic number.

28211000830 is the 137140-th pentagonal number.

28211000830 is a deficient number, since it is larger than the sum of its proper divisors (22758532994).

28211000830 is a wasteful number, since it uses less digits than its factorization.

28211000830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8340.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 28211000830 in words is "twenty-eight billion, two hundred eleven million, eight hundred thirty", and thus it is an aban number.