1322444840 has 64 divisors (see below), whose sum is σ = 3149928000. Its totient is φ = 498286080.

The previous prime is 1322444831. The next prime is 1322444983. The reversal of 1322444840 is 484442231.

It is a junction number, because it is equal to n+sod(n) for n = 1322444797 and 1322444806.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131180 + ... + 140900.

It is an arithmetic number, because the mean of its divisors is an integer number (49217625).

Almost surely, 2^1322444840 is an apocalyptic number.

1322444840 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 1322444840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574964000).

1322444840 is an abundant number, since it is smaller than the sum of its proper divisors (1827483160).

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

1322444840 is a wasteful number, since it uses less digits than its factorization.

1322444840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9930 (or 9926 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 1322444840 is about 36365.4346873511. The cubic root of 1322444840 is about 1097.6381389798.

The spelling of 1322444840 in words is "one billion, three hundred twenty-two million, four hundred forty-four thousand, eight hundred forty".