28667229 has 8 divisors (see below), whose sum is σ = 38265792. Its totient is φ = 19090080.

The previous prime is 28667213. The next prime is 28667231. The reversal of 28667229 is 92276682.

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

It is not a de Polignac number, because 28667229 - 2⁴ = 28667213 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28667279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1912 + ... + 7809.

It is an arithmetic number, because the mean of its divisors is an integer number (4783224).

Almost surely, 2^28667229 is an apocalyptic number.

It is an amenable number.

28667229 is a deficient number, since it is larger than the sum of its proper divisors (9598563).

28667229 is an equidigital number, since it uses as much as digits as its factorization.

28667229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707.

The product of its digits is 145152, while the sum is 42.

The square root of 28667229 is about 5354.1786484950. The cubic root of 28667229 is about 306.0520117493.

The spelling of 28667229 in words is "twenty-eight million, six hundred sixty-seven thousand, two hundred twenty-nine".