138617246 has 8 divisors (see below), whose sum is σ = 208858944. Its totient is φ = 68997600.

The previous prime is 138617239. The next prime is 138617249. The reversal of 138617246 is 642716831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138617249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154955 + ... + 155846.

It is an arithmetic number, because the mean of its divisors is an integer number (26107368).

Almost surely, 2^138617246 is an apocalyptic number.

138617246 is a deficient number, since it is larger than the sum of its proper divisors (70241698).

138617246 is a wasteful number, since it uses less digits than its factorization.

138617246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311026.

The product of its digits is 48384, while the sum is 38.

The square root of 138617246 is about 11773.5825473812. The cubic root of 138617246 is about 517.5342409295.

The spelling of 138617246 in words is "one hundred thirty-eight million, six hundred seventeen thousand, two hundred forty-six".