1938819684 has 96 divisors (see below), whose sum is σ = 4870736640. Its totient is φ = 598675968.

The previous prime is 1938819683. The next prime is 1938819697. The reversal of 1938819684 is 4869188391.

It is not an unprimeable number, because it can be changed into a prime (1938819683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3808822 + ... + 3809330.

It is an arithmetic number, because the mean of its divisors is an integer number (50736840).

Almost surely, 2^1938819684 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 1938819684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2435368320).

1938819684 is an abundant number, since it is smaller than the sum of its proper divisors (2931916956).

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

1938819684 is a wasteful number, since it uses less digits than its factorization.

1938819684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 947 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 57.

The square root of 1938819684 is about 44032.0302052949. The cubic root of 1938819684 is about 1246.9407179965.

The spelling of 1938819684 in words is "one billion, nine hundred thirty-eight million, eight hundred nineteen thousand, six hundred eighty-four".