138661150 has 12 divisors (see below), whose sum is σ = 257909832. Its totient is φ = 55464440.

The previous prime is 138661147. The next prime is 138661169. The reversal of 138661150 is 51166831.

It is a congruent number.

It is an unprimeable number.

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, 1386562 + ... + 1386661.

It is an arithmetic number, because the mean of its divisors is an integer number (21492486).

Almost surely, 2^138661150 is an apocalyptic number.

138661150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138661150 is a deficient number, since it is larger than the sum of its proper divisors (119248682).

138661150 is a wasteful number, since it uses less digits than its factorization.

138661150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773235 (or 2773230 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 138661150 is about 11775.4469129626. The cubic root of 138661150 is about 517.5888744028.

The spelling of 138661150 in words is "one hundred thirty-eight million, six hundred sixty-one thousand, one hundred fifty".