28115772863 has 8 divisors (see below), whose sum is σ = 28239632640. Its totient is φ = 27991965400.

The previous prime is 28115772799. The next prime is 28115772941. The reversal of 28115772863 is 36827751182.

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 28115772863 - 2⁶ = 28115772799 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 (28115772163) 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, 1392188 + ... + 1412238.

It is an arithmetic number, because the mean of its divisors is an integer number (3529954080).

Almost surely, 2^28115772863 is an apocalyptic number.

28115772863 is a deficient number, since it is larger than the sum of its proper divisors (123859777).

28115772863 is a wasteful number, since it uses less digits than its factorization.

28115772863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26157.

The product of its digits is 1128960, while the sum is 50.

The spelling of 28115772863 in words is "twenty-eight billion, one hundred fifteen million, seven hundred seventy-two thousand, eight hundred sixty-three".