138844130 has 8 divisors (see below), whose sum is σ = 249919452. Its totient is φ = 55537648.

The previous prime is 138844109. The next prime is 138844171. The reversal of 138844130 is 31448831.

It can be written as a sum of positive squares in 2 ways, for example, as 138839089 + 5041 = 11783^2 + 71^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 6942197 + ... + 6942216.

Almost surely, 2^138844130 is an apocalyptic number.

138844130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138844130 is a deficient number, since it is larger than the sum of its proper divisors (111075322).

138844130 is a wasteful number, since it uses less digits than its factorization.

138844130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13884420.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 138844130 is about 11783.2139079285. The cubic root of 138844130 is about 517.8164478389.

The spelling of 138844130 in words is "one hundred thirty-eight million, eight hundred forty-four thousand, one hundred thirty".