138178146 has 32 divisors (see below), whose sum is σ = 291997440. Its totient is φ = 43470864.

The previous prime is 138178133. The next prime is 138178147. The reversal of 138178146 is 641871831.

It is not an unprimeable number, because it can be changed into a prime (138178147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30121 + ... + 34403.

It is an arithmetic number, because the mean of its divisors is an integer number (9124920).

Almost surely, 2^138178146 is an apocalyptic number.

138178146 is an abundant number, since it is smaller than the sum of its proper divisors (153819294).

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

138178146 is a wasteful number, since it uses less digits than its factorization.

138178146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4590.

The product of its digits is 32256, while the sum is 39.

The square root of 138178146 is about 11754.9200762915. The cubic root of 138178146 is about 516.9871958139.

The spelling of 138178146 in words is "one hundred thirty-eight million, one hundred seventy-eight thousand, one hundred forty-six".