1938101892 has 24 divisors (see below), whose sum is σ = 4524469152. Its totient is φ = 645715200.

The previous prime is 1938101849. The next prime is 1938101899. The reversal of 1938101892 is 2981018391.

It is not an unprimeable number, because it can be changed into a prime (1938101899) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13834 + ... + 63777.

It is an arithmetic number, because the mean of its divisors is an integer number (188519548).

Almost surely, 2^1938101892 is an apocalyptic number.

1938101892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1938101892 is an abundant number, since it is smaller than the sum of its proper divisors (2586367260).

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

1938101892 is a wasteful number, since it uses less digits than its factorization.

1938101892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79699 (or 79697 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 1938101892 is about 44023.8786569289. The cubic root of 1938101892 is about 1246.7868177384.

The spelling of 1938101892 in words is "one billion, nine hundred thirty-eight million, one hundred one thousand, eight hundred ninety-two".