138568194 has 48 divisors (see below), whose sum is σ = 308374560. Its totient is φ = 44953920.

The previous prime is 138568189. The next prime is 138568201. The reversal of 138568194 is 491865831.

It is a super-2 number, since 2×138568194² = 38402288776843272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106689 + ... + 107979.

It is an arithmetic number, because the mean of its divisors is an integer number (6424470).

Almost surely, 2^138568194 is an apocalyptic number.

138568194 is an abundant number, since it is smaller than the sum of its proper divisors (169806366).

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

138568194 is a wasteful number, since it uses less digits than its factorization.

138568194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455 (or 1452 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 138568194 is about 11771.4992248226. The cubic root of 138568194 is about 517.4731877168.

The spelling of 138568194 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, one hundred ninety-four".