28366659 has 32 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 17018496.

The previous prime is 28366651. The next prime is 28366673. The reversal of 28366659 is 95666382.

It is a happy number.

It is not a de Polignac number, because 28366659 - 2³ = 28366651 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28366651) 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 31 ways as a sum of consecutive naturals, for example, 9214 + ... + 11900.

It is an arithmetic number, because the mean of its divisors is an integer number (1451520).

Almost surely, 2^28366659 is an apocalyptic number.

28366659 is a deficient number, since it is larger than the sum of its proper divisors (18081981).

28366659 is a wasteful number, since it uses less digits than its factorization.

28366659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736 (or 2730 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 28366659 is about 5326.0359555677. The cubic root of 28366659 is about 304.9786207356.

The spelling of 28366659 in words is "twenty-eight million, three hundred sixty-six thousand, six hundred fifty-nine".