1944338799 has 16 divisors (see below), whose sum is σ = 2938812800. Its totient is φ = 1133541216.

The previous prime is 1944338729. The next prime is 1944338801. The reversal of 1944338799 is 9978334491.

It is not a de Polignac number, because 1944338799 - 2¹² = 1944334703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944338719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1311229 + ... + 1312710.

It is an arithmetic number, because the mean of its divisors is an integer number (183675800).

Almost surely, 2^1944338799 is an apocalyptic number.

1944338799 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1944338799 is a deficient number, since it is larger than the sum of its proper divisors (994474001).

1944338799 is a wasteful number, since it uses less digits than its factorization.

1944338799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623974.

The product of its digits is 5878656, while the sum is 57.

The square root of 1944338799 is about 44094.6572613962. The cubic root of 1944338799 is about 1248.1227927389.

The spelling of 1944338799 in words is "one billion, nine hundred forty-four million, three hundred thirty-eight thousand, seven hundred ninety-nine".