78866896 has 20 divisors (see below), whose sum is σ = 153114084. Its totient is φ = 39353600.

The previous prime is 78866867. The next prime is 78866897. The reversal of 78866896 is 69866887.

It can be written as a sum of positive squares in 2 ways, for example, as 41216400 + 37650496 = 6420^2 + 6136^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78866896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78866897) 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 3 ways as a sum of consecutive naturals, for example, 3606 + ... + 13066.

Almost surely, 2^78866896 is an apocalyptic number.

It is an amenable number.

78866896 is a deficient number, since it is larger than the sum of its proper divisors (74247188).

78866896 is a wasteful number, since it uses less digits than its factorization.

78866896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9990 (or 9984 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 58.

The square root of 78866896 is about 8880.7035757309. The cubic root of 78866896 is about 428.8429249466.

Subtracting from 78866896 its reverse (69866887), we obtain a palindrome (9000009).

The spelling of 78866896 in words is "seventy-eight million, eight hundred sixty-six thousand, eight hundred ninety-six".