28912972863 has 8 divisors (see below), whose sum is σ = 39592539568. Its totient is φ = 18754360704.

The previous prime is 28912972813. The next prime is 28912972873. The reversal of 28912972863 is 36827921982.

It is a happy number.

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

It is not a de Polignac number, because 28912972863 - 2⁹ = 28912972351 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 (28912972813) 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, 130238506 + ... + 130238727.

It is an arithmetic number, because the mean of its divisors is an integer number (4949067446).

Almost surely, 2^28912972863 is an apocalyptic number.

28912972863 is a deficient number, since it is larger than the sum of its proper divisors (10679566705).

28912972863 is a wasteful number, since it uses less digits than its factorization.

28912972863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260477273.

The product of its digits is 5225472, while the sum is 57.

The spelling of 28912972863 in words is "twenty-eight billion, nine hundred twelve million, nine hundred seventy-two thousand, eight hundred sixty-three".