1938839834 has 32 divisors (see below), whose sum is σ = 3217222800. Its totient is φ = 872166400.

The previous prime is 1938839807. The next prime is 1938839843. The reversal of 1938839834 is 4389388391.

It can be written as a sum of positive squares in 8 ways, for example, as 1644545809 + 294294025 = 40553^2 + 17155^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1938839834.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89852 + ... + 109320.

Almost surely, 2^1938839834 is an apocalyptic number.

1938839834 is a deficient number, since it is larger than the sum of its proper divisors (1278382966).

1938839834 is a wasteful number, since it uses less digits than its factorization.

1938839834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19618.

The product of its digits is 4478976, while the sum is 56.

The square root of 1938839834 is about 44032.2590154082. The cubic root of 1938839834 is about 1246.9450377670.

The spelling of 1938839834 in words is "one billion, nine hundred thirty-eight million, eight hundred thirty-nine thousand, eight hundred thirty-four".