138751418 has 16 divisors (see below), whose sum is σ = 224490336. Its totient is φ = 63938160.

The previous prime is 138751409. The next prime is 138751423. The reversal of 138751418 is 814157831.

It is a happy number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 14105 + ... + 21827.

It is an arithmetic number, because the mean of its divisors is an integer number (14030646).

Almost surely, 2^138751418 is an apocalyptic number.

138751418 is a deficient number, since it is larger than the sum of its proper divisors (85738918).

138751418 is a wasteful number, since it uses less digits than its factorization.

138751418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8429.

The product of its digits is 26880, while the sum is 38.

The square root of 138751418 is about 11779.2791799838. The cubic root of 138751418 is about 517.7011663164.

The spelling of 138751418 in words is "one hundred thirty-eight million, seven hundred fifty-one thousand, four hundred eighteen".