138529128 has 16 divisors (see below), whose sum is σ = 346322880. Its totient is φ = 46176368.

The previous prime is 138529103. The next prime is 138529151. The reversal of 138529128 is 821925831.

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, 2886000 + ... + 2886047.

It is an arithmetic number, because the mean of its divisors is an integer number (21645180).

Almost surely, 2^138529128 is an apocalyptic number.

It is an amenable number.

138529128 is an abundant number, since it is smaller than the sum of its proper divisors (207793752).

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

138529128 is a wasteful number, since it uses less digits than its factorization.

138529128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772056 (or 5772052 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 138529128 is about 11769.8397610163. The cubic root of 138529128 is about 517.4245534017.

The spelling of 138529128 in words is "one hundred thirty-eight million, five hundred twenty-nine thousand, one hundred twenty-eight".