1028796389868 has 48 divisors (see below), whose sum is σ = 2627560707296. Its totient is φ = 311363343360.

The previous prime is 1028796389857. The next prime is 1028796389893. The reversal of 1028796389868 is 8689836978201.

It is a self number, because there is not a number n which added to its sum of digits gives 1028796389868.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54046621 + ... + 54065652.

Almost surely, 2^{1028796389868} is an apocalyptic number.

It is an amenable number.

1028796389868 is an abundant number, since it is smaller than the sum of its proper divisors (1598764317428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1028796389868 is a wasteful number, since it uses less digits than its factorization.

1028796389868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108112354 (or 108112352 counting only the distinct ones).

The product of its (nonzero) digits is 501645312, while the sum is 75.

The spelling of 1028796389868 in words is "one trillion, twenty-eight billion, seven hundred ninety-six million, three hundred eighty-nine thousand, eight hundred sixty-eight".