28218326 has 8 divisors (see below), whose sum is σ = 42863520. Its totient is φ = 13930488.

The previous prime is 28218319. The next prime is 28218329. The reversal of 28218326 is 62381282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28218292 and 28218301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28218329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89141 + ... + 89456.

It is an arithmetic number, because the mean of its divisors is an integer number (5357940).

Almost surely, 2^28218326 is an apocalyptic number.

28218326 is a deficient number, since it is larger than the sum of its proper divisors (14645194).

28218326 is a wasteful number, since it uses less digits than its factorization.

28218326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178678.

The product of its digits is 9216, while the sum is 32.

The square root of 28218326 is about 5312.0924314247. The cubic root of 28218326 is about 304.4461003081.

The spelling of 28218326 in words is "twenty-eight million, two hundred eighteen thousand, three hundred twenty-six".