28673207 has 4 divisors (see below), whose sum is σ = 28684440. Its totient is φ = 28661976.

The previous prime is 28673201. The next prime is 28673209. The reversal of 28673207 is 70237682.

28673207 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28673207 - 2⁴ = 28673191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28673201) 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, 269 + ... + 7577.

It is an arithmetic number, because the mean of its divisors is an integer number (7171110).

Almost surely, 2^28673207 is an apocalyptic number.

28673207 is a deficient number, since it is larger than the sum of its proper divisors (11233).

28673207 is an equidigital number, since it uses as much as digits as its factorization.

28673207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11232.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 28673207 is about 5354.7368749547. The cubic root of 28673207 is about 306.0732840270.

The spelling of 28673207 in words is "twenty-eight million, six hundred seventy-three thousand, two hundred seven".