1280722032820 has 24 divisors (see below), whose sum is σ = 2831069757600. Its totient is φ = 485326243872.

The previous prime is 1280722032817. The next prime is 1280722032827. The reversal of 1280722032820 is 282302270821.

It is a self number, because there is not a number n which added to its sum of digits gives 1280722032820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280722032827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685160190 + ... + 1685160949.

It is an arithmetic number, because the mean of its divisors is an integer number (117961239900).

Almost surely, 2^{1280722032820} is an apocalyptic number.

1280722032820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280722032820 is an abundant number, since it is smaller than the sum of its proper divisors (1550347724780).

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

1280722032820 is a wasteful number, since it uses less digits than its factorization.

1280722032820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370321167 (or 3370321165 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The spelling of 1280722032820 in words is "one trillion, two hundred eighty billion, seven hundred twenty-two million, thirty-two thousand, eight hundred twenty".