28289896 has 16 divisors (see below), whose sum is σ = 53640900. Its totient is φ = 13985664.

The previous prime is 28289881. The next prime is 28289897. The reversal of 28289896 is 69898282.

It can be written as a sum of positive squares in 2 ways, for example, as 27941796 + 348100 = 5286^2 + 590^2 .

It is not an unprimeable number, because it can be changed into a prime (28289897) 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, 19155 + ... + 20578.

Almost surely, 2^28289896 is an apocalyptic number.

It is an amenable number.

28289896 is a deficient number, since it is larger than the sum of its proper divisors (25351004).

28289896 is a wasteful number, since it uses less digits than its factorization.

28289896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39828 (or 39824 counting only the distinct ones).

The product of its digits is 995328, while the sum is 52.

The square root of 28289896 is about 5318.8246822019. The cubic root of 28289896 is about 304.7032713870.

The spelling of 28289896 in words is "twenty-eight million, two hundred eighty-nine thousand, eight hundred ninety-six".