28420964497 has 8 divisors (see below), whose sum is σ = 30455351136. Its totient is φ = 26426862912.

The previous prime is 28420964491. The next prime is 28420964557. The reversal of 28420964497 is 79446902482.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28420964497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28420964491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10069803 + ... + 10072624.

It is an arithmetic number, because the mean of its divisors is an integer number (3806918892).

Almost surely, 2^28420964497 is an apocalyptic number.

It is an amenable number.

28420964497 is a deficient number, since it is larger than the sum of its proper divisors (2034386639).

28420964497 is a wasteful number, since it uses less digits than its factorization.

28420964497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20142527.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 28420964497 in words is "twenty-eight billion, four hundred twenty million, nine hundred sixty-four thousand, four hundred ninety-seven".