28868745508 has 6 divisors (see below), whose sum is σ = 50520304646. Its totient is φ = 14434372752.

The previous prime is 28868745487. The next prime is 28868745509. The reversal of 28868745508 is 80554786882.

It can be written as a sum of positive squares in only one way, i.e., 28865330404 + 3415104 = 169898^2 + 1848^2 .

It is not an unprimeable number, because it can be changed into a prime (28868745509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608593185 + ... + 3608593192.

Almost surely, 2^28868745508 is an apocalyptic number.

It is an amenable number.

28868745508 is a deficient number, since it is larger than the sum of its proper divisors (21651559138).

28868745508 is a wasteful number, since it uses less digits than its factorization.

28868745508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7217186381 (or 7217186379 counting only the distinct ones).

The product of its (nonzero) digits is 34406400, while the sum is 61.

The spelling of 28868745508 in words is "twenty-eight billion, eight hundred sixty-eight million, seven hundred forty-five thousand, five hundred eight".