1938930966 has 64 divisors (see below), whose sum is σ = 4954636800. Its totient is φ = 550564128.

The previous prime is 1938930947. The next prime is 1938930967. The reversal of 1938930966 is 6690398391.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938930967) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 45880 + ... + 77348.

It is an arithmetic number, because the mean of its divisors is an integer number (77416200).

Almost surely, 2^1938930966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1938930966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2477318400).

1938930966 is an abundant number, since it is smaller than the sum of its proper divisors (3015705834).

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

1938930966 is a wasteful number, since it uses less digits than its factorization.

1938930966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31650 (or 31644 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 1938930966 is about 44033.2938354605. The cubic root of 1938930966 is about 1246.9645743326.

The spelling of 1938930966 in words is "one billion, nine hundred thirty-eight million, nine hundred thirty thousand, nine hundred sixty-six".