28663384667 has 16 divisors (see below), whose sum is σ = 32276190240. Its totient is φ = 25293938688.

The previous prime is 28663384657. The next prime is 28663384693. The reversal of 28663384667 is 76648336682.

It is a cyclic number.

It is not a de Polignac number, because 28663384667 - 2²⁰ = 28662336091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28663384657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426098 + ... + 488759.

It is an arithmetic number, because the mean of its divisors is an integer number (2017261890).

Almost surely, 2^28663384667 is an apocalyptic number.

28663384667 is a deficient number, since it is larger than the sum of its proper divisors (3612805573).

28663384667 is a wasteful number, since it uses less digits than its factorization.

28663384667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914990.

The product of its digits is 41803776, while the sum is 59.

The spelling of 28663384667 in words is "twenty-eight billion, six hundred sixty-three million, three hundred eighty-four thousand, six hundred sixty-seven".