28218327 has 8 divisors (see below), whose sum is σ = 37650816. Its totient is φ = 18799032.

The previous prime is 28218319. The next prime is 28218329. The reversal of 28218327 is 72381282.

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

It is not a de Polignac number, because 28218327 - 2³ = 28218319 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 4008 + ... + 8514.

It is an arithmetic number, because the mean of its divisors is an integer number (4706352).

Almost surely, 2^28218327 is an apocalyptic number.

28218327 is a deficient number, since it is larger than the sum of its proper divisors (9432489).

28218327 is a wasteful number, since it uses less digits than its factorization.

28218327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597.

The product of its digits is 10752, while the sum is 33.

The square root of 28218327 is about 5312.0925255496. The cubic root of 28218327 is about 304.4461039044.

The spelling of 28218327 in words is "twenty-eight million, two hundred eighteen thousand, three hundred twenty-seven".