78636846 has 16 divisors (see below), whose sum is σ = 157618944. Its totient is φ = 26154744.

The previous prime is 78636829. The next prime is 78636847. The reversal of 78636846 is 64863687.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78636795 and 78636804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78636847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11376 + ... + 16931.

It is an arithmetic number, because the mean of its divisors is an integer number (9851184).

Almost surely, 2^78636846 is an apocalyptic number.

78636846 is an abundant number, since it is smaller than the sum of its proper divisors (78982098).

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

78636846 is a wasteful number, since it uses less digits than its factorization.

78636846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28775.

The product of its digits is 1161216, while the sum is 48.

The square root of 78636846 is about 8867.7418771635. The cubic root of 78636846 is about 428.4255491758.

The spelling of 78636846 in words is "seventy-eight million, six hundred thirty-six thousand, eight hundred forty-six".