138041220 has 48 divisors (see below), whose sum is σ = 388704960. Its totient is φ = 36602496.

The previous prime is 138041161. The next prime is 138041261. The reversal of 138041220 is 22140831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4314 + ... + 17166.

It is an arithmetic number, because the mean of its divisors is an integer number (8098020).

Almost surely, 2^138041220 is an apocalyptic number.

138041220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138041220 is an abundant number, since it is smaller than the sum of its proper divisors (250663740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138041220 is a wasteful number, since it uses less digits than its factorization.

138041220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13044 (or 13042 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 138041220 is about 11749.0944331893. The cubic root of 138041220 is about 516.8163719265.

The spelling of 138041220 in words is "one hundred thirty-eight million, forty-one thousand, two hundred twenty".