138280318 has 8 divisors (see below), whose sum is σ = 226276920. Its totient is φ = 62854680.

The previous prime is 138280283. The next prime is 138280333. The reversal of 138280318 is 813082831.

138280318 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×138280318² = 38242892692362248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3142713 + ... + 3142756.

It is an arithmetic number, because the mean of its divisors is an integer number (28284615).

Almost surely, 2^138280318 is an apocalyptic number.

138280318 is a deficient number, since it is larger than the sum of its proper divisors (87996602).

138280318 is a wasteful number, since it uses less digits than its factorization.

138280318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285482.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 138280318 is about 11759.2651981321. The cubic root of 138280318 is about 517.1145883708.

The spelling of 138280318 in words is "one hundred thirty-eight million, two hundred eighty thousand, three hundred eighteen".