28994092009 has 4 divisors (see below), whose sum is σ = 28997415504. Its totient is φ = 28990768516.

The previous prime is 28994091989. The next prime is 28994092109. The reversal of 28994092009 is 90029049982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28994092009 - 2⁵ = 28994091977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28994092109) by changing a digit.

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, 1648627 + ... + 1666120.

It is an arithmetic number, because the mean of its divisors is an integer number (7249353876).

Almost surely, 2^28994092009 is an apocalyptic number.

It is an amenable number.

28994092009 is a deficient number, since it is larger than the sum of its proper divisors (3323495).

28994092009 is an equidigital number, since it uses as much as digits as its factorization.

28994092009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323494.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 28994092009 in words is "twenty-eight billion, nine hundred ninety-four million, ninety-two thousand, nine".