28100990323 has 4 divisors (see below), whose sum is σ = 32115417520. Its totient is φ = 24086563128.

The previous prime is 28100990321. The next prime is 28100990377. The reversal of 28100990323 is 32309900182.

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 28100990323 - 2¹ = 28100990321 is a prime.

It is the 167634-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28100990321) by changing a digit.

It is a nontrivial repunit in base 167633.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2007213588 + ... + 2007213601.

It is an arithmetic number, because the mean of its divisors is an integer number (8028854380).

Almost surely, 2^28100990323 is an apocalyptic number.

28100990323 is a deficient number, since it is larger than the sum of its proper divisors (4014427197).

28100990323 is an equidigital number, since it uses as much as digits as its factorization.

28100990323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014427196.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 28100990323 in words is "twenty-eight billion, one hundred million, nine hundred ninety thousand, three hundred twenty-three".