138372170 has 16 divisors (see below), whose sum is σ = 249258600. Its totient is φ = 55306944.

The previous prime is 138372131. The next prime is 138372173. The reversal of 138372170 is 71273831.

It can be written as a sum of positive squares in 4 ways, for example, as 84511249 + 53860921 = 9193^2 + 7339^2 .

It is not an unprimeable number, because it can be changed into a prime (138372173) 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, 11024 + ... + 19956.

Almost surely, 2^138372170 is an apocalyptic number.

138372170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138372170 is a deficient number, since it is larger than the sum of its proper divisors (110886430).

138372170 is a wasteful number, since it uses less digits than its factorization.

138372170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10489.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 138372170 is about 11763.1700659304. The cubic root of 138372170 is about 517.2290599431.

The spelling of 138372170 in words is "one hundred thirty-eight million, three hundred seventy-two thousand, one hundred seventy".