28972066064 has 20 divisors (see below), whose sum is σ = 56184028620. Its totient is φ = 14472961920.

The previous prime is 28972066049. The next prime is 28972066073. The reversal of 28972066064 is 46066027982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13131326464 + 15840739600 = 114592^2 + 125860^2 .

It is a super-2 number, since 2×28972066064² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 798647 + ... + 834134.

It is an arithmetic number, because the mean of its divisors is an integer number (2809201431).

Almost surely, 2^28972066064 is an apocalyptic number.

It is an amenable number.

28972066064 is a deficient number, since it is larger than the sum of its proper divisors (27211962556).

28972066064 is a wasteful number, since it uses less digits than its factorization.

28972066064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633898 (or 1633892 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 28972066064 in words is "twenty-eight billion, nine hundred seventy-two million, sixty-six thousand, sixty-four".