28643373966 has 16 divisors (see below), whose sum is σ = 58011897600. Its totient is φ = 9426933048.

The previous prime is 28643373961. The next prime is 28643373973. The reversal of 28643373966 is 66937334682.

It is a super-2 number, since 2×28643373966² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28643373961) 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 7 ways as a sum of consecutive naturals, for example, 30214056 + ... + 30215003.

It is an arithmetic number, because the mean of its divisors is an integer number (3625743600).

Almost surely, 2^28643373966 is an apocalyptic number.

28643373966 is an abundant number, since it is smaller than the sum of its proper divisors (29368523634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28643373966 is a wasteful number, since it uses less digits than its factorization.

28643373966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60429143.

The product of its digits is 23514624, while the sum is 57.

The spelling of 28643373966 in words is "twenty-eight billion, six hundred forty-three million, three hundred seventy-three thousand, nine hundred sixty-six".