28231214 has 8 divisors (see below), whose sum is σ = 46196568. Its totient is φ = 12832360.

The previous prime is 28231213. The next prime is 28231219. The reversal of 28231214 is 41213282.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28231214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28231213) 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, 641597 + ... + 641640.

It is an arithmetic number, because the mean of its divisors is an integer number (5774571).

Almost surely, 2^28231214 is an apocalyptic number.

28231214 is a deficient number, since it is larger than the sum of its proper divisors (17965354).

28231214 is a wasteful number, since it uses less digits than its factorization.

28231214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283250.

The product of its digits is 768, while the sum is 23.

The square root of 28231214 is about 5313.3053742468. The cubic root of 28231214 is about 304.4924425816.

Adding to 28231214 its reverse (41213282), we get a palindrome (69444496).

The spelling of 28231214 in words is "twenty-eight million, two hundred thirty-one thousand, two hundred fourteen".