28666323 has 18 divisors (see below), whose sum is σ = 48167964. Its totient is φ = 16380504.

The previous prime is 28666283. The next prime is 28666327. The reversal of 28666323 is 32366682.

It is not a de Polignac number, because 28666323 - 2¹⁶ = 28600787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28666327) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32061 + ... + 32942.

It is an arithmetic number, because the mean of its divisors is an integer number (2675998).

Almost surely, 2^28666323 is an apocalyptic number.

28666323 is a deficient number, since it is larger than the sum of its proper divisors (19501641).

28666323 is a wasteful number, since it uses less digits than its factorization.

28666323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65023 (or 65013 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 28666323 is about 5354.0940410120. The cubic root of 28666323 is about 306.0487875562.

The spelling of 28666323 in words is "twenty-eight million, six hundred sixty-six thousand, three hundred twenty-three".