28064000191 has 4 divisors (see below), whose sum is σ = 28065677392. Its totient is φ = 28062322992.

The previous prime is 28064000171. The next prime is 28064000219. The reversal of 28064000191 is 19100046082.

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 28064000191 - 2²¹ = 28061903039 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 (28064000171) 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, 813246 + ... + 847051.

It is an arithmetic number, because the mean of its divisors is an integer number (7016419348).

Almost surely, 2^28064000191 is an apocalyptic number.

28064000191 is a deficient number, since it is larger than the sum of its proper divisors (1677201).

28064000191 is a wasteful number, since it uses less digits than its factorization.

28064000191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677200.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 28064000191 in words is "twenty-eight billion, sixty-four million, one hundred ninety-one", and thus it is an aban number.