138741218 has 16 divisors (see below), whose sum is σ = 259464384. Its totient is φ = 54054960.

The previous prime is 138741217. The next prime is 138741259. The reversal of 138741218 is 812147831.

It is not an unprimeable number, because it can be changed into a prime (138741217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450305 + ... + 450612.

It is an arithmetic number, because the mean of its divisors is an integer number (16216524).

Almost surely, 2^138741218 is an apocalyptic number.

138741218 is a deficient number, since it is larger than the sum of its proper divisors (120723166).

138741218 is a wasteful number, since it uses less digits than its factorization.

138741218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900937.

The product of its digits is 10752, while the sum is 35.

The square root of 138741218 is about 11778.8462083516. The cubic root of 138741218 is about 517.6884801246.

The spelling of 138741218 in words is "one hundred thirty-eight million, seven hundred forty-one thousand, two hundred eighteen".