28911167 has 4 divisors (see below), whose sum is σ = 28947120. Its totient is φ = 28875216.

The previous prime is 28911137. The next prime is 28911187. The reversal of 28911167 is 76111982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76111982 = 2 ⋅38055991.

It is a cyclic number.

It is not a de Polignac number, because 28911167 - 2¹² = 28907071 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 (28911107) 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, 16742 + ... + 18387.

It is an arithmetic number, because the mean of its divisors is an integer number (7236780).

Almost surely, 2^28911167 is an apocalyptic number.

28911167 is a deficient number, since it is larger than the sum of its proper divisors (35953).

28911167 is an equidigital number, since it uses as much as digits as its factorization.

28911167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35952.

The product of its digits is 6048, while the sum is 35.

The square root of 28911167 is about 5376.9105441694. The cubic root of 28911167 is about 306.9176569719.

The spelling of 28911167 in words is "twenty-eight million, nine hundred eleven thousand, one hundred sixty-seven".