28289230 has 8 divisors (see below), whose sum is σ = 50920632. Its totient is φ = 11315688.

The previous prime is 28289167. The next prime is 28289231. The reversal of 28289230 is 3298282.

It is a happy number.

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 (28289231) 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, 1414452 + ... + 1414471.

It is an arithmetic number, because the mean of its divisors is an integer number (6365079).

Almost surely, 2^28289230 is an apocalyptic number.

28289230 is a deficient number, since it is larger than the sum of its proper divisors (22631402).

28289230 is a wasteful number, since it uses less digits than its factorization.

28289230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828930.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28289230 is about 5318.7620740168. The cubic root of 28289230 is about 304.7008802627.

The spelling of 28289230 in words is "twenty-eight million, two hundred eighty-nine thousand, two hundred thirty".