28869915664 has 10 divisors (see below), whose sum is σ = 55935461630. Its totient is φ = 14434957824.

The previous prime is 28869915643. The next prime is 28869915671. The reversal of 28869915664 is 46651996882.

It can be written as a sum of positive squares in only one way, i.e., 24217584400 + 4652331264 = 155620^2 + 68208^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28869915596 and 28869915605.

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 as a sum of consecutive naturals, namely, 902184849 + ... + 902184880.

It is an arithmetic number, because the mean of its divisors is an integer number (5593546163).

Almost surely, 2^28869915664 is an apocalyptic number.

It is an amenable number.

28869915664 is a deficient number, since it is larger than the sum of its proper divisors (27065545966).

28869915664 is a wasteful number, since it uses less digits than its factorization.

28869915664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804369737 (or 1804369731 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 64.

The spelling of 28869915664 in words is "twenty-eight billion, eight hundred sixty-nine million, nine hundred fifteen thousand, six hundred sixty-four".