28261712 has 10 divisors (see below), whose sum is σ = 54757098. Its totient is φ = 14130848.

The previous prime is 28261703. The next prime is 28261729. The reversal of 28261712 is 21716282.

It can be written as a sum of positive squares in only one way, i.e., 27920656 + 341056 = 5284^2 + 584^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 883163 + ... + 883194.

Almost surely, 2^28261712 is an apocalyptic number.

It is an amenable number.

28261712 is a deficient number, since it is larger than the sum of its proper divisors (26495386).

28261712 is a wasteful number, since it uses less digits than its factorization.

28261712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766365 (or 1766359 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 28261712 is about 5316.1745644777. The cubic root of 28261712 is about 304.6020502013.

Adding to 28261712 its reverse (21716282), we get a palindrome (49977994).

The spelling of 28261712 in words is "twenty-eight million, two hundred sixty-one thousand, seven hundred twelve".