138075128 has 32 divisors (see below), whose sum is σ = 273306000. Its totient is φ = 65214720.

The previous prime is 138075121. The next prime is 138075137. The reversal of 138075128 is 821570831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138075121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61058 + ... + 63278.

Almost surely, 2^138075128 is an apocalyptic number.

It is an amenable number.

138075128 is a deficient number, since it is larger than the sum of its proper divisors (135230872).

138075128 is a wasteful number, since it uses less digits than its factorization.

138075128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 138075128 is about 11750.5373494151. The cubic root of 138075128 is about 516.8586848310.

The spelling of 138075128 in words is "one hundred thirty-eight million, seventy-five thousand, one hundred twenty-eight".