28664920047 has 8 divisors (see below), whose sum is σ = 38282861056. Its totient is φ = 19078462872.

The previous prime is 28664920013. The next prime is 28664920049. The reversal of 28664920047 is 74002946682.

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

It is not a de Polignac number, because 28664920047 - 2²⁰ = 28663871471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28664919978 and 28664920005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28664920049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7868833 + ... + 7872474.

It is an arithmetic number, because the mean of its divisors is an integer number (4785357632).

Almost surely, 2^28664920047 is an apocalyptic number.

28664920047 is a deficient number, since it is larger than the sum of its proper divisors (9617941009).

28664920047 is a wasteful number, since it uses less digits than its factorization.

28664920047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15741917.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 28664920047 in words is "twenty-eight billion, six hundred sixty-four million, nine hundred twenty thousand, forty-seven".