28836137 has 4 divisors (see below), whose sum is σ = 31457616. Its totient is φ = 26214660.

The previous prime is 28836083. The next prime is 28836139. The reversal of 28836137 is 73163882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28836137 - 2⁸ = 28835881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28836137.

It is not an unprimeable number, because it can be changed into a prime (28836139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310723 + ... + 1310744.

It is an arithmetic number, because the mean of its divisors is an integer number (7864404).

Almost surely, 2^28836137 is an apocalyptic number.

It is an amenable number.

28836137 is a deficient number, since it is larger than the sum of its proper divisors (2621479).

28836137 is a wasteful number, since it uses less digits than its factorization.

28836137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621478.

The product of its digits is 48384, while the sum is 38.

The square root of 28836137 is about 5369.9289566995. The cubic root of 28836137 is about 306.6519236506.

The spelling of 28836137 in words is "twenty-eight million, eight hundred thirty-six thousand, one hundred thirty-seven".