28136272 has 20 divisors (see below), whose sum is σ = 54656596. Its totient is φ = 14031360.

The previous prime is 28136267. The next prime is 28136281. The reversal of 28136272 is 27263182.

It can be written as a sum of positive squares in 2 ways, for example, as 11128896 + 17007376 = 3336^2 + 4124^2 .

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, 4648 + ... + 8824.

Almost surely, 2^28136272 is an apocalyptic number.

It is an amenable number.

28136272 is a deficient number, since it is larger than the sum of its proper divisors (26520324).

28136272 is a wasteful number, since it uses less digits than its factorization.

28136272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606 (or 4600 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 28136272 is about 5304.3634867909. The cubic root of 28136272 is about 304.1507216595.

The spelling of 28136272 in words is "twenty-eight million, one hundred thirty-six thousand, two hundred seventy-two".