28212230 has 16 divisors (see below), whose sum is σ = 51040800. Its totient is φ = 11227392.

The previous prime is 28212227. The next prime is 28212251. The reversal of 28212230 is 3221282.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5099 + ... + 9078.

It is an arithmetic number, because the mean of its divisors is an integer number (3190050).

Almost surely, 2^28212230 is an apocalyptic number.

28212230 is a deficient number, since it is larger than the sum of its proper divisors (22828570).

28212230 is a wasteful number, since it uses less digits than its factorization.

28212230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14383.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 28212230 is about 5311.5186152361. The cubic root of 28212230 is about 304.4241755834.

The spelling of 28212230 in words is "twenty-eight million, two hundred twelve thousand, two hundred thirty".