28986537 has 4 divisors (see below), whose sum is σ = 38648720. Its totient is φ = 19324356.

The previous prime is 28986527. The next prime is 28986541. The reversal of 28986537 is 73568982.

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 not a de Polignac number, because 28986537 - 2⁶ = 28986473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28986527) 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 3 ways as a sum of consecutive naturals, for example, 4831087 + ... + 4831092.

It is an arithmetic number, because the mean of its divisors is an integer number (9662180).

Almost surely, 2^28986537 is an apocalyptic number.

It is an amenable number.

28986537 is a deficient number, since it is larger than the sum of its proper divisors (9662183).

28986537 is an equidigital number, since it uses as much as digits as its factorization.

28986537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9662182.

The product of its digits is 725760, while the sum is 48.

The square root of 28986537 is about 5383.9146538555. The cubic root of 28986537 is about 307.1841319895.

The spelling of 28986537 in words is "twenty-eight million, nine hundred eighty-six thousand, five hundred thirty-seven".