138197208 has 32 divisors (see below), whose sum is σ = 351160560. Its totient is φ = 45310080.

The previous prime is 138197201. The next prime is 138197221. The reversal of 138197208 is 802791831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138197201) 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, 45735 + ... + 48662.

Almost surely, 2^138197208 is an apocalyptic number.

It is an amenable number.

138197208 is an abundant number, since it is smaller than the sum of its proper divisors (212963352).

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

138197208 is a wasteful number, since it uses less digits than its factorization.

138197208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94467 (or 94463 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 138197208 is about 11755.7308577561. The cubic root of 138197208 is about 517.0109679204.

It can be divided in two parts, 1381 and 97208, that added together give a palindrome (98589).

The spelling of 138197208 in words is "one hundred thirty-eight million, one hundred ninety-seven thousand, two hundred eight".