28136200 has 24 divisors (see below), whose sum is σ = 65417130. Its totient is φ = 11254400.

The previous prime is 28136191. The next prime is 28136203. The reversal of 28136200 is 263182.

It can be written as a sum of positive squares in 3 ways, for example, as 12152196 + 15984004 = 3486^2 + 3998^2 .

It is not an unprimeable number, because it can be changed into a prime (28136203) 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 5 ways as a sum of consecutive naturals, for example, 70141 + ... + 70540.

Almost surely, 2^28136200 is an apocalyptic number.

28136200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28136200 is an abundant number, since it is smaller than the sum of its proper divisors (37280930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28136200 is a wasteful number, since it uses less digits than its factorization.

28136200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140697 (or 140688 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 28136200 is about 5304.3566999213. The cubic root of 28136200 is about 304.1504622213.

Adding to 28136200 its reverse (263182), we get a palindrome (28399382).

It can be divided in two parts, 281 and 36200, that added together give a square (36481 = 191²).

The spelling of 28136200 in words is "twenty-eight million, one hundred thirty-six thousand, two hundred".