1938397502 has 16 divisors (see below), whose sum is σ = 2957928192. Its totient is φ = 952489560.

The previous prime is 1938397501. The next prime is 1938397523. The reversal of 1938397502 is 2057938391.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40973 + ... + 74535.

It is an arithmetic number, because the mean of its divisors is an integer number (184870512).

Almost surely, 2^1938397502 is an apocalyptic number.

1938397502 is a deficient number, since it is larger than the sum of its proper divisors (1019530690).

1938397502 is a wasteful number, since it uses less digits than its factorization.

1938397502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34063.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 1938397502 is about 44027.2359114219. The cubic root of 1938397502 is about 1246.8502034520.

The spelling of 1938397502 in words is "one billion, nine hundred thirty-eight million, three hundred ninety-seven thousand, five hundred two".