28136212 has 24 divisors (see below), whose sum is σ = 53312000. Its totient is φ = 12915936.

The previous prime is 28136203. The next prime is 28136219. The reversal of 28136212 is 21263182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28136219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8989 + ... + 11707.

Almost surely, 2^28136212 is an apocalyptic number.

It is an amenable number.

28136212 is a deficient number, since it is larger than the sum of its proper divisors (25175788).

28136212 is a wasteful number, since it uses less digits than its factorization.

28136212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935 (or 2933 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 28136212 is about 5304.3578310668. The cubic root of 28136212 is about 304.1505054610.

Adding to 28136212 its reverse (21263182), we get a palindrome (49399394).

It can be divided in two parts, 2813 and 6212, that added together give a square (9025 = 95²).

The spelling of 28136212 in words is "twenty-eight million, one hundred thirty-six thousand, two hundred twelve".