28136537 has 16 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 23030400.

The previous prime is 28136531. The next prime is 28136551. The reversal of 28136537 is 73563182.

It is a cyclic number.

It is not a de Polignac number, because 28136537 - 2⁸ = 28136281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28136497 and 28136506.

It is not an unprimeable number, because it can be changed into a prime (28136531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3464 + ... + 8262.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^28136537 is an apocalyptic number.

It is an amenable number.

28136537 is a deficient number, since it is larger than the sum of its proper divisors (5732263).

28136537 is a wasteful number, since it uses less digits than its factorization.

28136537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4864.

The product of its digits is 30240, while the sum is 35.

The square root of 28136537 is about 5304.3884661665. The cubic root of 28136537 is about 304.1516765324.

The spelling of 28136537 in words is "twenty-eight million, one hundred thirty-six thousand, five hundred thirty-seven".