138171850 has 24 divisors (see below), whose sum is σ = 257980140. Its totient is φ = 55057920.

The previous prime is 138171841. The next prime is 138171851. The reversal of 138171850 is 58171831.

It can be written as a sum of positive squares in 6 ways, for example, as 7458361 + 130713489 = 2731^2 + 11433^2 .

It is not an unprimeable number, because it can be changed into a prime (138171851) 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 11 ways as a sum of consecutive naturals, for example, 8314 + ... + 18586.

Almost surely, 2^138171850 is an apocalyptic number.

138171850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138171850 is a deficient number, since it is larger than the sum of its proper divisors (119808290).

138171850 is a wasteful number, since it uses less digits than its factorization.

138171850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554 (or 10549 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 138171850 is about 11754.6522704842. The cubic root of 138171850 is about 516.9793436296.

The spelling of 138171850 in words is "one hundred thirty-eight million, one hundred seventy-one thousand, eight hundred fifty".