1322404452440 has 16 divisors (see below), whose sum is σ = 2975410018080. Its totient is φ = 528961780960.

The previous prime is 1322404452401. The next prime is 1322404452443. The reversal of 1322404452440 is 442544042231.

It is a self number, because there is not a number n which added to its sum of digits gives 1322404452440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322404452443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16530055616 + ... + 16530055695.

It is an arithmetic number, because the mean of its divisors is an integer number (185963126130).

Almost surely, 2^{1322404452440} is an apocalyptic number.

1322404452440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322404452440 is an abundant number, since it is smaller than the sum of its proper divisors (1653005565640).

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

1322404452440 is a wasteful number, since it uses less digits than its factorization.

1322404452440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33060111322 (or 33060111318 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 1322404452440 its reverse (442544042231), we get a palindrome (1764948494671).

The spelling of 1322404452440 in words is "one trillion, three hundred twenty-two billion, four hundred four million, four hundred fifty-two thousand, four hundred forty".