78678863 has 8 divisors (see below), whose sum is σ = 81645696. Its totient is φ = 75763800.

The previous prime is 78678851. The next prime is 78678869. The reversal of 78678863 is 36887687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78678863 - 2¹⁸ = 78416719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78678869) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9833 + ... + 15938.

It is an arithmetic number, because the mean of its divisors is an integer number (10205712).

Almost surely, 2^78678863 is an apocalyptic number.

78678863 is a deficient number, since it is larger than the sum of its proper divisors (2966833).

78678863 is a wasteful number, since it uses less digits than its factorization.

78678863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25885.

The product of its digits is 2709504, while the sum is 53.

The square root of 78678863 is about 8870.1106531993. The cubic root of 78678863 is about 428.5018406009.

The spelling of 78678863 in words is "seventy-eight million, six hundred seventy-eight thousand, eight hundred sixty-three".