28312766408 has 16 divisors (see below), whose sum is σ = 53092962780. Its totient is φ = 14154643008.

The previous prime is 28312766393. The next prime is 28312766429. The reversal of 28312766408 is 80466721382.

It can be written as a sum of positive squares in 2 ways, for example, as 28244835844 + 67930564 = 168062^2 + 8242^2 .

It is a super-2 number, since 2×28312766408² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147035 + ... + 279722.

Almost surely, 2^28312766408 is an apocalyptic number.

It is an amenable number.

28312766408 is a deficient number, since it is larger than the sum of its proper divisors (24780196372).

28312766408 is a wasteful number, since it uses less digits than its factorization.

28312766408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435056 (or 435052 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 28312766408 in words is "twenty-eight billion, three hundred twelve million, seven hundred sixty-six thousand, four hundred eight".