938138678 has 16 divisors (see below), whose sum is σ = 1453521024. Its totient is φ = 453650880.

The previous prime is 938138639. The next prime is 938138681. The reversal of 938138678 is 876831839.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120026 + ... + 127602.

It is an arithmetic number, because the mean of its divisors is an integer number (90845064).

Almost surely, 2^938138678 is an apocalyptic number.

938138678 is a deficient number, since it is larger than the sum of its proper divisors (515382346).

938138678 is a wasteful number, since it uses less digits than its factorization.

938138678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9607.

The product of its digits is 1741824, while the sum is 53.

The square root of 938138678 is about 30629.0495771580. The cubic root of 938138678 is about 978.9391122708.

The spelling of 938138678 in words is "nine hundred thirty-eight million, one hundred thirty-eight thousand, six hundred seventy-eight".