1938423764 has 6 divisors (see below), whose sum is σ = 3392241594. Its totient is φ = 969211880.

The previous prime is 1938423763. The next prime is 1938423787. The reversal of 1938423764 is 4673248391.

It can be written as a sum of positive squares in only one way, i.e., 1923524164 + 14899600 = 43858^2 + 3860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938423763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242302967 + ... + 242302974.

It is an arithmetic number, because the mean of its divisors is an integer number (565373599).

Almost surely, 2^1938423764 is an apocalyptic number.

It is an amenable number.

1938423764 is a deficient number, since it is larger than the sum of its proper divisors (1453817830).

1938423764 is a wasteful number, since it uses less digits than its factorization.

1938423764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484605945 (or 484605943 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 1938423764 is about 44027.5341576155. The cubic root of 1938423764 is about 1246.8558343287.

The spelling of 1938423764 in words is "one billion, nine hundred thirty-eight million, four hundred twenty-three thousand, seven hundred sixty-four".