28967818647 has 16 divisors (see below), whose sum is σ = 38952385920. Its totient is φ = 19147928352.

The previous prime is 28967818637. The next prime is 28967818673. The reversal of 28967818647 is 74681876982.

It is a happy number.

It is not a de Polignac number, because 28967818647 - 2¹⁰ = 28967817623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28967818637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277408 + ... + 367274.

It is an arithmetic number, because the mean of its divisors is an integer number (2434524120).

Almost surely, 2^28967818647 is an apocalyptic number.

28967818647 is a deficient number, since it is larger than the sum of its proper divisors (9984567273).

28967818647 is a wasteful number, since it uses less digits than its factorization.

28967818647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90782.

The product of its digits is 65028096, while the sum is 66.

The spelling of 28967818647 in words is "twenty-eight billion, nine hundred sixty-seven million, eight hundred eighteen thousand, six hundred forty-seven".