1938397504 has 14 divisors (see below), whose sum is σ = 3846507674. Its totient is φ = 969198720.

The previous prime is 1938397501. The next prime is 1938397523. The reversal of 1938397504 is 4057938391.

It can be written as a sum of positive squares in only one way, i.e., 1751255104 + 187142400 = 41848^2 + 13680^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938397501) 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 as a sum of consecutive naturals, namely, 15143667 + ... + 15143794.

Almost surely, 2^1938397504 is an apocalyptic number.

It is an amenable number.

1938397504 is a deficient number, since it is larger than the sum of its proper divisors (1908110170).

1938397504 is an equidigital number, since it uses as much as digits as its factorization.

1938397504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30287473 (or 30287463 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 1938397504 is about 44027.2359341351. The cubic root of 1938397504 is about 1246.8502038808.

The spelling of 1938397504 in words is "one billion, nine hundred thirty-eight million, three hundred ninety-seven thousand, five hundred four".