28272920111 has 4 divisors (see below), whose sum is σ = 29184949824. Its totient is φ = 27360890400.

The previous prime is 28272920107. The next prime is 28272920231. The reversal of 28272920111 is 11102927282.

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 28272920111 - 2² = 28272920107 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 (28272923111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456014810 + ... + 456014871.

It is an arithmetic number, because the mean of its divisors is an integer number (7296237456).

Almost surely, 2^28272920111 is an apocalyptic number.

28272920111 is a deficient number, since it is larger than the sum of its proper divisors (912029713).

28272920111 is an equidigital number, since it uses as much as digits as its factorization.

28272920111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912029712.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 28272920111 in words is "twenty-eight billion, two hundred seventy-two million, nine hundred twenty thousand, one hundred eleven".