28668924160 has 36 divisors (see below), whose sum is σ = 68671035468. Its totient is φ = 11467569152.

The previous prime is 28668924157. The next prime is 28668924161. The reversal of 28668924160 is 6142986682.

It can be written as a sum of positive squares in 2 ways, for example, as 18274713856 + 10394210304 = 135184^2 + 101952^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28668924098 and 28668924107.

It is not an unprimeable number, because it can be changed into a prime (28668924161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11197519 + ... + 11200078.

It is an arithmetic number, because the mean of its divisors is an integer number (1907528763).

Almost surely, 2^28668924160 is an apocalyptic number.

28668924160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28668924160 is an abundant number, since it is smaller than the sum of its proper divisors (40002111308).

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

28668924160 is an equidigital number, since it uses as much as digits as its factorization.

28668924160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22397618 (or 22397604 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 28668924160 in words is "twenty-eight billion, six hundred sixty-eight million, nine hundred twenty-four thousand, one hundred sixty".