28864954991 has 8 divisors (see below), whose sum is σ = 29008131984. Its totient is φ = 28721943360.

The previous prime is 28864954969. The next prime is 28864954999. The reversal of 28864954991 is 19945946882.

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 not a de Polignac number, because 28864954991 - 2³⁰ = 27791213167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28864954999) 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 7 ways as a sum of consecutive naturals, for example, 316265 + ... + 397181.

It is an arithmetic number, because the mean of its divisors is an integer number (3626016498).

Almost surely, 2^28864954991 is an apocalyptic number.

28864954991 is a deficient number, since it is larger than the sum of its proper divisors (143176993).

28864954991 is a wasteful number, since it uses less digits than its factorization.

28864954991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82681.

The product of its digits is 44789760, while the sum is 65.

The spelling of 28864954991 in words is "twenty-eight billion, eight hundred sixty-four million, nine hundred fifty-four thousand, nine hundred ninety-one".