28668675 has 72 divisors (see below), whose sum is σ = 57250800. Its totient is φ = 12606720.

The previous prime is 28668667. The next prime is 28668683. The reversal of 28668675 is 57686682.

It is an interprime number because it is at equal distance from previous prime (28668667) and next prime (28668683).

It is not a de Polignac number, because 28668675 - 2³ = 28668667 is a prime.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 106441 + ... + 106709.

It is an arithmetic number, because the mean of its divisors is an integer number (795150).

Almost surely, 2^28668675 is an apocalyptic number.

28668675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28668675 is a deficient number, since it is larger than the sum of its proper divisors (28582125).

28668675 is a wasteful number, since it uses less digits than its factorization.

28668675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 313 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 28668675 is about 5354.3136815095. The cubic root of 28668675 is about 306.0571575061.

The spelling of 28668675 in words is "twenty-eight million, six hundred sixty-eight thousand, six hundred seventy-five".