138700678 has 16 divisors (see below), whose sum is σ = 215534880. Its totient is φ = 66862656.

The previous prime is 138700669. The next prime is 138700691. The reversal of 138700678 is 876007831.

It is a self number, because there is not a number n which added to its sum of digits gives 138700678.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54850 + ... + 57322.

It is an arithmetic number, because the mean of its divisors is an integer number (13470930).

Almost surely, 2^138700678 is an apocalyptic number.

138700678 is a deficient number, since it is larger than the sum of its proper divisors (76834202).

138700678 is a wasteful number, since it uses less digits than its factorization.

138700678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 138700678 is about 11777.1252009988. The cubic root of 138700678 is about 517.6380525834.

The spelling of 138700678 in words is "one hundred thirty-eight million, seven hundred thousand, six hundred seventy-eight".