28775266768 has 40 divisors (see below), whose sum is σ = 56073723552. Its totient is φ = 14304732288.

The previous prime is 28775266753. The next prime is 28775266771. The reversal of 28775266768 is 86766257782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7143571 + ... + 7147597.

Almost surely, 2^28775266768 is an apocalyptic number.

It is an amenable number.

28775266768 is a deficient number, since it is larger than the sum of its proper divisors (27298456784).

28775266768 is a wasteful number, since it uses less digits than its factorization.

28775266768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499 (or 6493 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 64.

The spelling of 28775266768 in words is "twenty-eight billion, seven hundred seventy-five million, two hundred sixty-six thousand, seven hundred sixty-eight".