28083322691 has 4 divisors (see below), whose sum is σ = 28090730472. Its totient is φ = 28075914912.

The previous prime is 28083322643. The next prime is 28083322733. The reversal of 28083322691 is 19622338082.

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 28083322691 - 2¹⁰ = 28083321667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28083327691) 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, 3698201 + ... + 3705786.

It is an arithmetic number, because the mean of its divisors is an integer number (7022682618).

Almost surely, 2^28083322691 is an apocalyptic number.

28083322691 is a deficient number, since it is larger than the sum of its proper divisors (7407781).

28083322691 is an equidigital number, since it uses as much as digits as its factorization.

28083322691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407780.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 28083322691 in words is "twenty-eight billion, eighty-three million, three hundred twenty-two thousand, six hundred ninety-one".