1938942668 has 48 divisors (see below), whose sum is σ = 3795634080. Its totient is φ = 860504064.

The previous prime is 1938942641. The next prime is 1938942671. The reversal of 1938942668 is 8662498391.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385055 + ... + 390057.

It is an arithmetic number, because the mean of its divisors is an integer number (79075710).

Almost surely, 2^1938942668 is an apocalyptic number.

It is an amenable number.

1938942668 is a deficient number, since it is larger than the sum of its proper divisors (1856691412).

1938942668 is a wasteful number, since it uses less digits than its factorization.

1938942668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306 (or 5304 counting only the distinct ones).

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

The square root of 1938942668 is about 44033.4267119878. The cubic root of 1938942668 is about 1246.9670829229.

The spelling of 1938942668 in words is "one billion, nine hundred thirty-eight million, nine hundred forty-two thousand, six hundred sixty-eight".