139856678 has 32 divisors (see below), whose sum is σ = 232315776. Its totient is φ = 62742528.

The previous prime is 139856659. The next prime is 139856729. The reversal of 139856678 is 876658931.

It is a happy number.

139856678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 235550 + ... + 236142.

It is an arithmetic number, because the mean of its divisors is an integer number (7259868).

Almost surely, 2^139856678 is an apocalyptic number.

139856678 is a deficient number, since it is larger than the sum of its proper divisors (92459098).

139856678 is a wasteful number, since it uses less digits than its factorization.

139856678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 2177280, while the sum is 53.

The square root of 139856678 is about 11826.1015554577. The cubic root of 139856678 is about 519.0721595335.

The spelling of 139856678 in words is "one hundred thirty-nine million, eight hundred fifty-six thousand, six hundred seventy-eight".