28189214 has 8 divisors (see below), whose sum is σ = 44122320. Its totient is φ = 13481776.

The previous prime is 28189159. The next prime is 28189219. The reversal of 28189214 is 41298182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189219) 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, 306359 + ... + 306450.

It is an arithmetic number, because the mean of its divisors is an integer number (5515290).

Almost surely, 2^28189214 is an apocalyptic number.

28189214 is a deficient number, since it is larger than the sum of its proper divisors (15933106).

28189214 is a wasteful number, since it uses less digits than its factorization.

28189214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612834.

The product of its digits is 9216, while the sum is 35.

The square root of 28189214 is about 5309.3515611607. The cubic root of 28189214 is about 304.3413683155.

The spelling of 28189214 in words is "twenty-eight million, one hundred eighty-nine thousand, two hundred fourteen".