28667099 has 4 divisors (see below), whose sum is σ = 28715400. Its totient is φ = 28618800.

The previous prime is 28667087. The next prime is 28667129. The reversal of 28667099 is 99076682.

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 28667099 - 2⁸ = 28666843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28667069) 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, 23249 + ... + 24450.

It is an arithmetic number, because the mean of its divisors is an integer number (7178850).

Almost surely, 2^28667099 is an apocalyptic number.

28667099 is a deficient number, since it is larger than the sum of its proper divisors (48301).

28667099 is an equidigital number, since it uses as much as digits as its factorization.

28667099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48300.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 28667099 is about 5354.1665084306. The cubic root of 28667099 is about 306.0515491209.

The spelling of 28667099 in words is "twenty-eight million, six hundred sixty-seven thousand, ninety-nine".