1920939938 has 16 divisors (see below), whose sum is σ = 3034536000. Its totient is φ = 909477072.

The previous prime is 1920939931. The next prime is 1920939941. The reversal of 1920939938 is 8399390291.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1920939938.

It is not an unprimeable number, because it can be changed into a prime (1920939931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75083 + ... + 97361.

It is an arithmetic number, because the mean of its divisors is an integer number (189658500).

Almost surely, 2^1920939938 is an apocalyptic number.

1920939938 is a deficient number, since it is larger than the sum of its proper divisors (1113596062).

1920939938 is a wasteful number, since it uses less digits than its factorization.

1920939938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24569.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 1920939938 is about 43828.5288140042. The cubic root of 1920939938 is about 1243.0957891483.

The spelling of 1920939938 in words is "one billion, nine hundred twenty million, nine hundred thirty-nine thousand, nine hundred thirty-eight".