28218060 has 144 divisors (see below), whose sum is σ = 95397120. Its totient is φ = 6704640.

The previous prime is 28218053. The next prime is 28218061. The reversal of 28218060 is 6081282.

It is not an unprimeable number, because it can be changed into a prime (28218061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72346 + ... + 72734.

It is an arithmetic number, because the mean of its divisors is an integer number (662480).

Almost surely, 2^28218060 is an apocalyptic number.

28218060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28218060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47698560).

28218060 is an abundant number, since it is smaller than the sum of its proper divisors (67179060).

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

28218060 is a wasteful number, since it uses less digits than its factorization.

28218060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28218060 is about 5312.0673941508. The cubic root of 28218060 is about 304.4451436849.

The spelling of 28218060 in words is "twenty-eight million, two hundred eighteen thousand, sixty".