138180370 has 16 divisors (see below), whose sum is σ = 249124248. Its totient is φ = 55183360.

The previous prime is 138180349. The next prime is 138180377. The reversal of 138180370 is 73081831.

It can be written as a sum of positive squares in 4 ways, for example, as 110649361 + 27531009 = 10519^2 + 5247^2 .

It is not an unprimeable number, because it can be changed into a prime (138180377) 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, 4369 + ... + 17188.

Almost surely, 2^138180370 is an apocalyptic number.

138180370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138180370 is a deficient number, since it is larger than the sum of its proper divisors (110943878).

138180370 is a wasteful number, since it uses less digits than its factorization.

138180370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22205.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 138180370 is about 11755.0146745974. The cubic root of 138180370 is about 516.9899694637.

The spelling of 138180370 in words is "one hundred thirty-eight million, one hundred eighty thousand, three hundred seventy".