28668500465 has 32 divisors (see below), whose sum is σ = 38621214720. Its totient is φ = 20250193600.

The previous prime is 28668500461. The next prime is 28668500467. The reversal of 28668500465 is 56400586682.

It is not a de Polignac number, because 28668500465 - 2² = 28668500461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28668500461) 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 31 ways as a sum of consecutive naturals, for example, 296306 + ... + 380964.

It is an arithmetic number, because the mean of its divisors is an integer number (1206912960).

Almost surely, 2^28668500465 is an apocalyptic number.

It is an amenable number.

28668500465 is a deficient number, since it is larger than the sum of its proper divisors (9952714255).

28668500465 is a wasteful number, since it uses less digits than its factorization.

28668500465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84853.

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 28668500465 in words is "twenty-eight billion, six hundred sixty-eight million, five hundred thousand, four hundred sixty-five".