138070668 has 48 divisors (see below), whose sum is σ = 342093024. Its totient is φ = 43192320.

The previous prime is 138070649. The next prime is 138070697. The reversal of 138070668 is 866070831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92488 + ... + 93968.

It is an arithmetic number, because the mean of its divisors is an integer number (7126938).

Almost surely, 2^138070668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138070668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171046512).

138070668 is an abundant number, since it is smaller than the sum of its proper divisors (204022356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138070668 is a wasteful number, since it uses less digits than its factorization.

138070668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 138070668 is about 11750.3475693275. The cubic root of 138070668 is about 516.8531197096.

The spelling of 138070668 in words is "one hundred thirty-eight million, seventy thousand, six hundred sixty-eight".