28867722115 has 4 divisors (see below), whose sum is σ = 34641266544. Its totient is φ = 23094177688.

The previous prime is 28867722113. The next prime is 28867722127. The reversal of 28867722115 is 51122776882.

It is a happy number.

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 28867722115 - 2¹ = 28867722113 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28867722113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2886772207 + ... + 2886772216.

It is an arithmetic number, because the mean of its divisors is an integer number (8660316636).

Almost surely, 2^28867722115 is an apocalyptic number.

28867722115 is a deficient number, since it is larger than the sum of its proper divisors (5773544429).

28867722115 is an equidigital number, since it uses as much as digits as its factorization.

28867722115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773544428.

The product of its digits is 752640, while the sum is 49.

The spelling of 28867722115 in words is "twenty-eight billion, eight hundred sixty-seven million, seven hundred twenty-two thousand, one hundred fifteen".