28449068264 has 16 divisors (see below), whose sum is σ = 53468712420. Its totient is φ = 14190744960.

The previous prime is 28449068257. The next prime is 28449068267. The reversal of 28449068264 is 46286094482.

It can be written as a sum of positive squares in 2 ways, for example, as 28119936100 + 329132164 = 167690^2 + 18142^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28449068267) 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 3 ways as a sum of consecutive naturals, for example, 4220069 + ... + 4226804.

Almost surely, 2^28449068264 is an apocalyptic number.

It is an amenable number.

28449068264 is a deficient number, since it is larger than the sum of its proper divisors (25019644156).

28449068264 is a wasteful number, since it uses less digits than its factorization.

28449068264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8447300 (or 8447296 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 28449068264 in words is "twenty-eight billion, four hundred forty-nine million, sixty-eight thousand, two hundred sixty-four".