1944322380 has 720 divisors, whose sum is σ = 8327161920. Its totient is φ = 369515520.

The previous prime is 1944322363. The next prime is 1944322381. The reversal of 1944322380 is 832234491.

1944322380 is a `hidden beast` number, since 194 + 432 + 2 + 38 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1944322381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 17837766 + ... + 17837874.

Almost surely, 2^1944322380 is an apocalyptic number.

1944322380 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 1944322380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4163580960).

1944322380 is an abundant number, since it is smaller than the sum of its proper divisors (6382839540).

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

1944322380 is a wasteful number, since it uses less digits than its factorization.

1944322380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1944322380 is about 44094.4710819849. The cubic root of 1944322380 is about 1248.1192794647.

The spelling of 1944322380 in words is "one billion, nine hundred forty-four million, three hundred twenty-two thousand, three hundred eighty".