28669089 has 24 divisors (see below), whose sum is σ = 41604640. Its totient is φ = 17547264.

The previous prime is 28669087. The next prime is 28669093. The reversal of 28669089 is 98096682.

It is not a de Polignac number, because 28669089 - 2¹ = 28669087 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28669087) 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 23 ways as a sum of consecutive naturals, for example, 36897 + ... + 37665.

Almost surely, 2^28669089 is an apocalyptic number.

It is an amenable number.

28669089 is a deficient number, since it is larger than the sum of its proper divisors (12935551).

28669089 is a wasteful number, since it uses less digits than its factorization.

28669089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 28669089 is about 5354.3523417870. The cubic root of 28669089 is about 306.0586307407.

The spelling of 28669089 in words is "twenty-eight million, six hundred sixty-nine thousand, eighty-nine".