138111758 has 8 divisors (see below), whose sum is σ = 213850560. Its totient is φ = 66828240.

The previous prime is 138111749. The next prime is 138111811. The reversal of 138111758 is 857111831.

138111758 is digitally balanced in base 2, 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113743 + ... + 1113866.

It is an arithmetic number, because the mean of its divisors is an integer number (26731320).

Almost surely, 2^138111758 is an apocalyptic number.

138111758 is a deficient number, since it is larger than the sum of its proper divisors (75738802).

138111758 is a wasteful number, since it uses less digits than its factorization.

138111758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227642.

The product of its digits is 6720, while the sum is 35.

The square root of 138111758 is about 11752.0958981792. The cubic root of 138111758 is about 516.9043866648.

The spelling of 138111758 in words is "one hundred thirty-eight million, one hundred eleven thousand, seven hundred fifty-eight".