1939918716 has 72 divisors (see below), whose sum is σ = 5167772064. Its totient is φ = 612374400.

The previous prime is 1939918711. The next prime is 1939918751. The reversal of 1939918716 is 6178199391.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939918711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72030 + ... + 95226.

It is an arithmetic number, because the mean of its divisors is an integer number (71774612).

Almost surely, 2^1939918716 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 1939918716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2583886032).

1939918716 is an abundant number, since it is smaller than the sum of its proper divisors (3227853348).

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

1939918716 is a wasteful number, since it uses less digits than its factorization.

1939918716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23331 (or 23326 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 1939918716 is about 44044.5083523474. The cubic root of 1939918716 is about 1247.1762855257.

The spelling of 1939918716 in words is "one billion, nine hundred thirty-nine million, nine hundred eighteen thousand, seven hundred sixteen".