28289650 has 12 divisors (see below), whose sum is σ = 52618842. Its totient is φ = 11315840.

The previous prime is 28289647. The next prime is 28289669. The reversal of 28289650 is 5698282.

It can be written as a sum of positive squares in 3 ways, for example, as 27531009 + 758641 = 5247^2 + 871^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282847 + ... + 282946.

Almost surely, 2^28289650 is an apocalyptic number.

28289650 is a deficient number, since it is larger than the sum of its proper divisors (24329192).

28289650 is a wasteful number, since it uses less digits than its factorization.

28289650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565805 (or 565800 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 28289650 is about 5318.8015567419. The cubic root of 28289650 is about 304.7023881833.

The spelling of 28289650 in words is "twenty-eight million, two hundred eighty-nine thousand, six hundred fifty".