28230712 has 16 divisors (see below), whose sum is σ = 53458200. Its totient is φ = 13975200.

The previous prime is 28230701. The next prime is 28230721. The reversal of 28230712 is 21703282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16662 + ... + 18277.

Almost surely, 2^28230712 is an apocalyptic number.

It is an amenable number.

28230712 is a deficient number, since it is larger than the sum of its proper divisors (25227488).

28230712 is a wasteful number, since it uses less digits than its factorization.

28230712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35046 (or 35042 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28230712 is about 5313.2581341395. The cubic root of 28230712 is about 304.4906377695.

Adding to 28230712 its reverse (21703282), we get a palindrome (49933994).

The spelling of 28230712 in words is "twenty-eight million, two hundred thirty thousand, seven hundred twelve".