1938989384 has 16 divisors (see below), whose sum is σ = 3724279020. Its totient is φ = 945848320.

The previous prime is 1938989341. The next prime is 1938989473. The reversal of 1938989384 is 4839898391.

It can be written as a sum of positive squares in 2 ways, for example, as 1557880900 + 381108484 = 39470^2 + 19522^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2955449 + ... + 2956104.

Almost surely, 2^1938989384 is an apocalyptic number.

It is an amenable number.

1938989384 is a deficient number, since it is larger than the sum of its proper divisors (1785289636).

1938989384 is a wasteful number, since it uses less digits than its factorization.

1938989384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5911600 (or 5911596 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 62.

The square root of 1938989384 is about 44033.9571694391. The cubic root of 1938989384 is about 1246.9770974611.

The spelling of 1938989384 in words is "one billion, nine hundred thirty-eight million, nine hundred eighty-nine thousand, three hundred eighty-four".