28000218 has 32 divisors (see below), whose sum is σ = 57480192. Its totient is φ = 9089600.

The previous prime is 28000187. The next prime is 28000237. The reversal of 28000218 is 81200082.

It is a junction number, because it is equal to n+sod(n) for n = 28000194 and 28000203.

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 15 ways as a sum of consecutive naturals, for example, 60508 + ... + 60968.

It is an arithmetic number, because the mean of its divisors is an integer number (1796256).

Almost surely, 2^28000218 is an apocalyptic number.

28000218 is an abundant number, since it is smaller than the sum of its proper divisors (29479974).

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

28000218 is a wasteful number, since it uses less digits than its factorization.

28000218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 28000218 is about 5291.5232211529. The cubic root of 28000218 is about 303.6596852527.

The spelling of 28000218 in words is "twenty-eight million, two hundred eighteen", and thus it is an aban number.