1944783920 has 40 divisors (see below), whose sum is σ = 4538481840. Its totient is φ = 775013120.

The previous prime is 1944783913. The next prime is 1944783923. The reversal of 1944783920 is 293874491.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1944783923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23666 + ... + 66705.

It is an arithmetic number, because the mean of its divisors is an integer number (113462046).

Almost surely, 2^1944783920 is an apocalyptic number.

1944783920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1944783920 is an abundant number, since it is smaller than the sum of its proper divisors (2593697920).

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

1944783920 is a wasteful number, since it uses less digits than its factorization.

1944783920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90653 (or 90647 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 1944783920 is about 44099.7043073987. The cubic root of 1944783920 is about 1248.2180304748.

The spelling of 1944783920 in words is "one billion, nine hundred forty-four million, seven hundred eighty-three thousand, nine hundred twenty".