78814878 has 8 divisors (see below), whose sum is σ = 157629768. Its totient is φ = 26271624.

The previous prime is 78814877. The next prime is 78814913. The reversal of 78814878 is 87841887.

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

78814878 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 78814878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78814877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6567901 + ... + 6567912.

It is an arithmetic number, because the mean of its divisors is an integer number (19703721).

Almost surely, 2^78814878 is an apocalyptic number.

78814878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78814878 is a wasteful number, since it uses less digits than its factorization.

78814878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13135818.

The product of its digits is 802816, while the sum is 51.

The square root of 78814878 is about 8877.7743832562. The cubic root of 78814878 is about 428.7486206667.

The spelling of 78814878 in words is "seventy-eight million, eight hundred fourteen thousand, eight hundred seventy-eight".