28142218 has 24 divisors (see below), whose sum is σ = 46116000. Its totient is φ = 12873744.

The previous prime is 28142183. The next prime is 28142227. The reversal of 28142218 is 81224182.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 46683 + ... + 47281.

It is an arithmetic number, because the mean of its divisors is an integer number (1921500).

Almost surely, 2^28142218 is an apocalyptic number.

28142218 is a deficient number, since it is larger than the sum of its proper divisors (17973782).

28142218 is a wasteful number, since it uses less digits than its factorization.

28142218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 753 counting only the distinct ones).

The product of its digits is 2048, while the sum is 28.

The square root of 28142218 is about 5304.9239391343. The cubic root of 28142218 is about 304.1721454029.

The spelling of 28142218 in words is "twenty-eight million, one hundred forty-two thousand, two hundred eighteen".