138349210 has 8 divisors (see below), whose sum is σ = 249028596. Its totient is φ = 55339680.

The previous prime is 138349207. The next prime is 138349219. The reversal of 138349210 is 12943831.

It can be written as a sum of positive squares in 2 ways, for example, as 135792409 + 2556801 = 11653^2 + 1599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138349219) 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 3 ways as a sum of consecutive naturals, for example, 6917451 + ... + 6917470.

Almost surely, 2^138349210 is an apocalyptic number.

138349210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138349210 is a deficient number, since it is larger than the sum of its proper divisors (110679386).

138349210 is a wasteful number, since it uses less digits than its factorization.

138349210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13834928.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 138349210 is about 11762.1940980414. The cubic root of 138349210 is about 517.2004505387.

The spelling of 138349210 in words is "one hundred thirty-eight million, three hundred forty-nine thousand, two hundred ten".