78426678 has 32 divisors (see below), whose sum is σ = 181180800. Its totient is φ = 22367360.

The previous prime is 78426659. The next prime is 78426713. The reversal of 78426678 is 87662487.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33828 + ... + 36071.

It is an arithmetic number, because the mean of its divisors is an integer number (5661900).

Almost surely, 2^78426678 is an apocalyptic number.

78426678 is an abundant number, since it is smaller than the sum of its proper divisors (102754122).

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

78426678 is a wasteful number, since it uses less digits than its factorization.

78426678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69932.

The product of its digits is 903168, while the sum is 48.

The square root of 78426678 is about 8855.8838068258. The cubic root of 78426678 is about 428.0435328533.

The spelling of 78426678 in words is "seventy-eight million, four hundred twenty-six thousand, six hundred seventy-eight".