28647969466 has 4 divisors (see below), whose sum is σ = 42971954202. Its totient is φ = 14323984732.

The previous prime is 28647969463. The next prime is 28647969481. The reversal of 28647969466 is 66496974682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19257390441 + 9390579025 = 138771^2 + 96905^2 .

It is not an unprimeable number, because it can be changed into a prime (28647969461) 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 as a sum of consecutive naturals, namely, 7161992365 + ... + 7161992368.

Almost surely, 2^28647969466 is an apocalyptic number.

28647969466 is a deficient number, since it is larger than the sum of its proper divisors (14323984736).

28647969466 is a wasteful number, since it uses less digits than its factorization.

28647969466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14323984735.

The product of its digits is 188116992, while the sum is 67.

The spelling of 28647969466 in words is "twenty-eight billion, six hundred forty-seven million, nine hundred sixty-nine thousand, four hundred sixty-six".