193868938 has 16 divisors (see below), whose sum is σ = 293472360. Its totient is φ = 96048576.

The previous prime is 193868933. The next prime is 193868957. The reversal of 193868938 is 839868391.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 128210329 + 65658609 = 11323^2 + 8103^2 .

It is not an unprimeable number, because it can be changed into a prime (193868933) 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, 159220 + ... + 160432.

Almost surely, 2^193868938 is an apocalyptic number.

193868938 is a deficient number, since it is larger than the sum of its proper divisors (99603422).

193868938 is a wasteful number, since it uses less digits than its factorization.

193868938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881.

The product of its digits is 2239488, while the sum is 55.

The square root of 193868938 is about 13923.6826306836. The cubic root of 193868938 is about 578.7656448274.

It can be divided in two parts, 1938 and 68938, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 193868938 in words is "one hundred ninety-three million, eight hundred sixty-eight thousand, nine hundred thirty-eight".