28663384715 has 24 divisors (see below), whose sum is σ = 40019171040. Its totient is φ = 19651244928.

The previous prime is 28663384693. The next prime is 28663384721. The reversal of 28663384715 is 51748336682.

It is a happy number.

It is not a de Polignac number, because 28663384715 - 2¹² = 28663380619 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2426714 + ... + 2438496.

It is an arithmetic number, because the mean of its divisors is an integer number (1667465460).

Almost surely, 2^28663384715 is an apocalyptic number.

28663384715 is a deficient number, since it is larger than the sum of its proper divisors (11355786325).

28663384715 is a wasteful number, since it uses less digits than its factorization.

28663384715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21731 (or 21724 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 53.

The spelling of 28663384715 in words is "twenty-eight billion, six hundred sixty-three million, three hundred eighty-four thousand, seven hundred fifteen".