28944971163 has 20 divisors (see below), whose sum is σ = 43243449480. Its totient is φ = 19294565472.

The previous prime is 28944971147. The next prime is 28944971183. The reversal of 28944971163 is 36117944982.

28944971163 is a `hidden beast` number, since 2 + 8 + 94 + 497 + 1 + 1 + 63 = 666.

It is not a de Polignac number, because 28944971163 - 2⁴ = 28944971147 is a prime.

It is a super-2 number, since 2×28944971163² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28944971123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1243728 + ... + 1266786.

It is an arithmetic number, because the mean of its divisors is an integer number (2162172474).

Almost surely, 2^28944971163 is an apocalyptic number.

28944971163 is a deficient number, since it is larger than the sum of its proper divisors (14298478317).

28944971163 is a wasteful number, since it uses less digits than its factorization.

28944971163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38568 (or 38559 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 28944971163 in words is "twenty-eight billion, nine hundred forty-four million, nine hundred seventy-one thousand, one hundred sixty-three".