138678968 has 16 divisors (see below), whose sum is σ = 260250000. Its totient is φ = 69278976.

The previous prime is 138678949. The next prime is 138679001. The reversal of 138678968 is 869876831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3053 + ... + 16931.

It is an arithmetic number, because the mean of its divisors is an integer number (16265625).

Almost surely, 2^138678968 is an apocalyptic number.

It is an amenable number.

138678968 is a deficient number, since it is larger than the sum of its proper divisors (121571032).

138678968 is a wasteful number, since it uses less digits than its factorization.

138678968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15134 (or 15130 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 56.

The square root of 138678968 is about 11776.2034629162. The cubic root of 138678968 is about 517.6110435626.

The spelling of 138678968 in words is "one hundred thirty-eight million, six hundred seventy-eight thousand, nine hundred sixty-eight".