28312214 has 8 divisors (see below), whose sum is σ = 48535248. Its totient is φ = 12133800.

The previous prime is 28312211. The next prime is 28312231. The reversal of 28312214 is 41221382.

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 28312214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28312211) 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, 1011137 + ... + 1011164.

It is an arithmetic number, because the mean of its divisors is an integer number (6066906).

Almost surely, 2^28312214 is an apocalyptic number.

28312214 is a deficient number, since it is larger than the sum of its proper divisors (20223034).

28312214 is a wasteful number, since it uses less digits than its factorization.

28312214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022310.

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

The square root of 28312214 is about 5320.9222884759. The cubic root of 28312214 is about 304.7833774917.

Adding to 28312214 its reverse (41221382), we get a palindrome (69533596).

The spelling of 28312214 in words is "twenty-eight million, three hundred twelve thousand, two hundred fourteen".