28331248191 has 16 divisors (see below), whose sum is σ = 38658749184. Its totient is φ = 18445742784.

The previous prime is 28331248181. The next prime is 28331248193. The reversal of 28331248191 is 19184213382.

It is not a de Polignac number, because 28331248191 - 2¹¹ = 28331246143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331248193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1664275 + ... + 1681211.

It is an arithmetic number, because the mean of its divisors is an integer number (2416171824).

Almost surely, 2^28331248191 is an apocalyptic number.

28331248191 is a deficient number, since it is larger than the sum of its proper divisors (10327500993).

28331248191 is a wasteful number, since it uses less digits than its factorization.

28331248191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29950.

The product of its digits is 82944, while the sum is 42.

The spelling of 28331248191 in words is "twenty-eight billion, three hundred thirty-one million, two hundred forty-eight thousand, one hundred ninety-one".