138213734 has 8 divisors (see below), whose sum is σ = 207375168. Its totient is φ = 69088680.

The previous prime is 138213701. The next prime is 138213737. The reversal of 138213734 is 437312831.

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

It is a self number, because there is not a number n which added to its sum of digits gives 138213734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138213737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4424 + ... + 17204.

It is an arithmetic number, because the mean of its divisors is an integer number (25921896).

Almost surely, 2^138213734 is an apocalyptic number.

138213734 is a deficient number, since it is larger than the sum of its proper divisors (69161434).

138213734 is a wasteful number, since it uses less digits than its factorization.

138213734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18190.

The product of its digits is 12096, while the sum is 32.

The square root of 138213734 is about 11756.4337279636. The cubic root of 138213734 is about 517.0315756274.

The spelling of 138213734 in words is "one hundred thirty-eight million, two hundred thirteen thousand, seven hundred thirty-four".