1222402304440 has 256 divisors, whose sum is σ = 3004033443840. Its totient is φ = 446383872000.

The previous prime is 1222402304323. The next prime is 1222402304441. The reversal of 1222402304440 is 444032042221.

It is a junction number, because it is equal to n+sod(n) for n = 1222402304399 and 1222402304408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222402304441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1185646725 + ... + 1185647755.

It is an arithmetic number, because the mean of its divisors is an integer number (11734505640).

Almost surely, 2^{1222402304440} is an apocalyptic number.

1222402304440 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 1222402304440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502016721920).

1222402304440 is an abundant number, since it is smaller than the sum of its proper divisors (1781631139400).

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

1222402304440 is a wasteful number, since it uses less digits than its factorization.

1222402304440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 1222402304440 its reverse (444032042221), we get a palindrome (1666434346661).

The spelling of 1222402304440 in words is "one trillion, two hundred twenty-two billion, four hundred two million, three hundred four thousand, four hundred forty".