28616212 has 12 divisors (see below), whose sum is σ = 50200276. Its totient is φ = 14273280.

The previous prime is 28616201. The next prime is 28616213. The reversal of 28616212 is 21261682.

It can be written as a sum of positive squares in 2 ways, for example, as 1430416 + 27185796 = 1196^2 + 5214^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28616213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6813 + ... + 10180.

Almost surely, 2^28616212 is an apocalyptic number.

It is an amenable number.

28616212 is a deficient number, since it is larger than the sum of its proper divisors (21584064).

28616212 is a wasteful number, since it uses less digits than its factorization.

28616212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17418 (or 17416 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 28616212 is about 5349.4123041695. The cubic root of 28616212 is about 305.8703510461.

Adding to 28616212 its reverse (21261682), we get a palindrome (49877894).

The spelling of 28616212 in words is "twenty-eight million, six hundred sixteen thousand, two hundred twelve".