28667003 has 4 divisors (see below), whose sum is σ = 28688520. Its totient is φ = 28645488.

The previous prime is 28666987. The next prime is 28667017. The reversal of 28667003 is 30076682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28667003 - 2⁴ = 28666987 is a prime.

It is a super-2 number, since 2×28667003² = 1643594122004018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28667203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8618 + ... + 11471.

It is an arithmetic number, because the mean of its divisors is an integer number (7172130).

Almost surely, 2^28667003 is an apocalyptic number.

28667003 is a deficient number, since it is larger than the sum of its proper divisors (21517).

28667003 is a wasteful number, since it uses less digits than its factorization.

28667003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21516.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 28667003 is about 5354.1575434423. The cubic root of 28667003 is about 306.0512074867.

The spelling of 28667003 in words is "twenty-eight million, six hundred sixty-seven thousand, three".