1331722944 has 280 divisors, whose sum is σ = 4162367088. Its totient is φ = 420526080.

The previous prime is 1331722937. The next prime is 1331722979. The reversal of 1331722944 is 4492271331.

It is a happy number.

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 = 1331722899 and 1331722908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10165759 + ... + 10165889.

Almost surely, 2^1331722944 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 1331722944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2081183544).

1331722944 is an abundant number, since it is smaller than the sum of its proper divisors (2830644144).

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

1331722944 is a wasteful number, since it uses less digits than its factorization.

1331722944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 226 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1331722944 is about 36492.7793405764. The cubic root of 1331722944 is about 1100.1991220795.

The spelling of 1331722944 in words is "one billion, three hundred thirty-one million, seven hundred twenty-two thousand, nine hundred forty-four".