1028843786280 has 128 divisors (see below), whose sum is σ = 3099355902720. Its totient is φ = 273219133440.

The previous prime is 1028843786279. The next prime is 1028843786339. The reversal of 1028843786280 is 826873488201.

It is a self number, because there is not a number n which added to its sum of digits gives 1028843786280.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166665274 + ... + 166671446.

It is an arithmetic number, because the mean of its divisors is an integer number (24213717990).

Almost surely, 2^{1028843786280} is an apocalyptic number.

1028843786280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028843786280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1549677951360).

1028843786280 is an abundant number, since it is smaller than the sum of its proper divisors (2070512116440).

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

1028843786280 is a wasteful number, since it uses less digits than its factorization.

1028843786280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11731 (or 11727 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 57.

The spelling of 1028843786280 in words is "one trillion, twenty-eight billion, eight hundred forty-three million, seven hundred eighty-six thousand, two hundred eighty".