28311690791 has 16 divisors (see below), whose sum is σ = 30021216000. Its totient is φ = 26624376000.

The previous prime is 28311690767. The next prime is 28311690793. The reversal of 28311690791 is 19709611382.

It is a cyclic number.

It is not a de Polignac number, because 28311690791 - 2¹⁴ = 28311674407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28311690793) 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 15 ways as a sum of consecutive naturals, for example, 5193035 + ... + 5198483.

It is an arithmetic number, because the mean of its divisors is an integer number (1876326000).

Almost surely, 2^28311690791 is an apocalyptic number.

28311690791 is a deficient number, since it is larger than the sum of its proper divisors (1709525209).

28311690791 is a wasteful number, since it uses less digits than its factorization.

28311690791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 28311690791 in words is "twenty-eight billion, three hundred eleven million, six hundred ninety thousand, seven hundred ninety-one".