138054678 has 32 divisors (see below), whose sum is σ = 280026720. Its totient is φ = 45369600.

The previous prime is 138054677. The next prime is 138054727. The reversal of 138054678 is 876450831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138054677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247576 + ... + 248132.

It is an arithmetic number, because the mean of its divisors is an integer number (8750835).

Almost surely, 2^138054678 is an apocalyptic number.

138054678 is an abundant number, since it is smaller than the sum of its proper divisors (141972042).

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

138054678 is a wasteful number, since it uses less digits than its factorization.

138054678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 138054678 is about 11749.6671442216. The cubic root of 138054678 is about 516.8331666412.

The spelling of 138054678 in words is "one hundred thirty-eight million, fifty-four thousand, six hundred seventy-eight".