1228340111780 has 24 divisors (see below), whose sum is σ = 2594424728952. Its totient is φ = 488495950592.

The previous prime is 1228340111771. The next prime is 1228340111783. The reversal of 1228340111780 is 871110438221.

It can be written as a sum of positive squares in 4 ways, for example, as 55572404644 + 1172767707136 = 235738^2 + 1082944^2 .

It is not an unprimeable number, because it can be changed into a prime (1228340111783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177502337 + ... + 177509256.

It is an arithmetic number, because the mean of its divisors is an integer number (108101030373).

Almost surely, 2^{1228340111780} is an apocalyptic number.

1228340111780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228340111780 is an abundant number, since it is smaller than the sum of its proper divisors (1366084617172).

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

1228340111780 is a wasteful number, since it uses less digits than its factorization.

1228340111780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355011775 (or 355011773 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The spelling of 1228340111780 in words is "one trillion, two hundred twenty-eight billion, three hundred forty million, one hundred eleven thousand, seven hundred eighty".