138178528 has 24 divisors (see below), whose sum is σ = 278676720. Its totient is φ = 67403520.

The previous prime is 138178511. The next prime is 138178529. The reversal of 138178528 is 825871831.

138178528 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138178529) 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, 51348 + ... + 53971.

It is an arithmetic number, because the mean of its divisors is an integer number (11611530).

Almost surely, 2^138178528 is an apocalyptic number.

It is an amenable number.

138178528 is an abundant number, since it is smaller than the sum of its proper divisors (140498192).

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

138178528 is a wasteful number, since it uses less digits than its factorization.

138178528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105370 (or 105362 counting only the distinct ones).

The product of its digits is 107520, while the sum is 43.

The square root of 138178528 is about 11754.9363247956. The cubic root of 138178528 is about 516.9876722253.

The spelling of 138178528 in words is "one hundred thirty-eight million, one hundred seventy-eight thousand, five hundred twenty-eight".