138065178 has 8 divisors (see below), whose sum is σ = 276130368. Its totient is φ = 46021724.

The previous prime is 138065173. The next prime is 138065183. The reversal of 138065178 is 871560831.

It is an interprime number because it is at equal distance from previous prime (138065173) and next prime (138065183).

It is a sphenic number, since it is the product of 3 distinct primes.

138065178 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138065173) 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 3 ways as a sum of consecutive naturals, for example, 11505426 + ... + 11505437.

It is an arithmetic number, because the mean of its divisors is an integer number (34516296).

Almost surely, 2^138065178 is an apocalyptic number.

138065178 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138065178 is a wasteful number, since it uses less digits than its factorization.

138065178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23010868.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 138065178 is about 11750.1139568942. The cubic root of 138065178 is about 516.8462692050.

The spelling of 138065178 in words is "one hundred thirty-eight million, sixty-five thousand, one hundred seventy-eight".