28863291664 has 15 divisors (see below), whose sum is σ = 55923944293. Its totient is φ = 14431306048.

The previous prime is 28863291641. The next prime is 28863291671. The reversal of 28863291664 is 46619236882.

The square root of 28863291664 is 169892.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4835811600 + 24027480064 = 69540^2 + 155008^2 .

It is a super-2 number, since 2×28863291664² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 658332 + ... + 700804.

Almost surely, 2^28863291664 is an apocalyptic number.

28863291664 is the 169892-nd square number.

It is an amenable number.

28863291664 is a deficient number, since it is larger than the sum of its proper divisors (27060652629).

28863291664 is an frugal number, since it uses more digits than its factorization.

28863291664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84954 (or 42475 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The spelling of 28863291664 in words is "twenty-eight billion, eight hundred sixty-three million, two hundred ninety-one thousand, six hundred sixty-four".