1938409344 has 96 divisors (see below), whose sum is σ = 5696814240. Its totient is φ = 632371200.

The previous prime is 1938409339. The next prime is 1938409367. The reversal of 1938409344 is 4439048391.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 1938409344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36244 + ... + 72044.

It is an arithmetic number, because the mean of its divisors is an integer number (59341815).

Almost surely, 2^1938409344 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 1938409344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848407120).

1938409344 is an abundant number, since it is smaller than the sum of its proper divisors (3758404896).

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

1938409344 is a wasteful number, since it uses less digits than its factorization.

1938409344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35868 (or 35853 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1938409344 is about 44027.3703961524. The cubic root of 1938409344 is about 1246.8527425201.

The spelling of 1938409344 in words is "one billion, nine hundred thirty-eight million, four hundred nine thousand, three hundred forty-four".