1322722944 has 288 divisors, whose sum is σ = 4213298700. Its totient is φ = 397737984.

The previous prime is 1322722909. The next prime is 1322722987. The reversal of 1322722944 is 4492272231.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1089000000 + 233722944 = 33000^2 + 15288^2 .

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1322722899 and 1322722908.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9654844 + ... + 9654980.

Almost surely, 2^1322722944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1322722944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106649350).

1322722944 is an abundant number, since it is smaller than the sum of its proper divisors (2890575756).

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

1322722944 is a wasteful number, since it uses less digits than its factorization.

1322722944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 188 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 1322722944 is about 36369.2582272446. The cubic root of 1322722944 is about 1097.7150763189.

The spelling of 1322722944 in words is "one billion, three hundred twenty-two million, seven hundred twenty-two thousand, nine hundred forty-four".