1280788011240 has 32 divisors (see below), whose sum is σ = 3842364034080. Its totient is φ = 341543469632.

The previous prime is 1280788011211. The next prime is 1280788011241. The reversal of 1280788011240 is 421108870821.

It is a super-2 number, since 2×1280788011240² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1280788011192 and 1280788011201.

It is not an unprimeable number, because it can be changed into a prime (1280788011241) 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, 5336616594 + ... + 5336616833.

It is an arithmetic number, because the mean of its divisors is an integer number (120073876065).

Almost surely, 2^{1280788011240} is an apocalyptic number.

1280788011240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280788011240 is an abundant number, since it is smaller than the sum of its proper divisors (2561576022840).

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

1280788011240 is a wasteful number, since it uses less digits than its factorization.

1280788011240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673233441 (or 10673233437 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 42.

It can be divided in two parts, 128078 and 8011240, that added together give a palindrome (8139318).

The spelling of 1280788011240 in words is "one trillion, two hundred eighty billion, seven hundred eighty-eight million, eleven thousand, two hundred forty".