28666003 has 8 divisors (see below), whose sum is σ = 30264320. Its totient is φ = 27076680.

The previous prime is 28665983. The next prime is 28666021. The reversal of 28666003 is 30066682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28666003 - 2⁵ = 28665971 is a prime.

It is a super-3 number, since 3×28666003³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28666903) 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 7 ways as a sum of consecutive naturals, for example, 4918 + ... + 9028.

It is an arithmetic number, because the mean of its divisors is an integer number (3783040).

Almost surely, 2^28666003 is an apocalyptic number.

28666003 is a deficient number, since it is larger than the sum of its proper divisors (1598317).

28666003 is a wasteful number, since it uses less digits than its factorization.

28666003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4497.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28666003 is about 5354.0641572547. The cubic root of 28666003 is about 306.0476487521.

The spelling of 28666003 in words is "twenty-eight million, six hundred sixty-six thousand, three".