194519538 has 12 divisors (see below), whose sum is σ = 421459038. Its totient is φ = 64839840.

The previous prime is 194519537. The next prime is 194519543. The reversal of 194519538 is 835915491.

It can be written as a sum of positive squares in only one way, i.e., 194518809 + 729 = 13947^2 + 27^2 .

It is a junction number, because it is equal to n+sod(n) for n = 194519493 and 194519502.

It is not an unprimeable number, because it can be changed into a prime (194519531) 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 5 ways as a sum of consecutive naturals, for example, 5403303 + ... + 5403338.

Almost surely, 2^194519538 is an apocalyptic number.

194519538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

194519538 is an abundant number, since it is smaller than the sum of its proper divisors (226939500).

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

194519538 is a wasteful number, since it uses less digits than its factorization.

194519538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806649 (or 10806646 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 194519538 is about 13947.0261346281. The cubic root of 194519538 is about 579.4123437491.

The spelling of 194519538 in words is "one hundred ninety-four million, five hundred nineteen thousand, five hundred thirty-eight".