1944938688 has 224 divisors, whose sum is σ = 6452006400. Its totient is φ = 502333440.

The previous prime is 1944938663. The next prime is 1944938731. The reversal of 1944938688 is 8868394491.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×1944938688² = 7565573000158322688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4331488 + ... + 4331936.

It is an arithmetic number, because the mean of its divisors is an integer number (28803600).

Almost surely, 2^1944938688 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 1944938688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3226003200).

1944938688 is an abundant number, since it is smaller than the sum of its proper divisors (4507067712).

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

1944938688 is a wasteful number, since it uses less digits than its factorization.

1944938688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 765 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 60.

The square root of 1944938688 is about 44101.4590234836. The cubic root of 1944938688 is about 1248.2511411085.

The spelling of 1944938688 in words is "one billion, nine hundred forty-four million, nine hundred thirty-eight thousand, six hundred eighty-eight".