28670267 has 4 divisors (see below), whose sum is σ = 28889256. Its totient is φ = 28451280.

The previous prime is 28670261. The next prime is 28670287. The reversal of 28670267 is 76207682.

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 28670267 - 2¹⁰ = 28669243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28670267.

It is not an unprimeable number, because it can be changed into a prime (28670261) 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, 109298 + ... + 109559.

It is an arithmetic number, because the mean of its divisors is an integer number (7222314).

Almost surely, 2^28670267 is an apocalyptic number.

28670267 is a deficient number, since it is larger than the sum of its proper divisors (218989).

28670267 is a wasteful number, since it uses less digits than its factorization.

28670267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218988.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 28670267 is about 5354.4623446243. The cubic root of 28670267 is about 306.0628226206.

The spelling of 28670267 in words is "twenty-eight million, six hundred seventy thousand, two hundred sixty-seven".