78766788 has 24 divisors (see below), whose sum is σ = 184034592. Its totient is φ = 26220544.

The previous prime is 78766777. The next prime is 78766801. The reversal of 78766788 is 88766787.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5956 + ... + 13892.

It is an arithmetic number, because the mean of its divisors is an integer number (7668108).

Almost surely, 2^78766788 is an apocalyptic number.

It is an amenable number.

78766788 is an abundant number, since it is smaller than the sum of its proper divisors (105267804).

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

78766788 is a wasteful number, since it uses less digits than its factorization.

78766788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8771 (or 8769 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 57.

The square root of 78766788 is about 8875.0655208849. The cubic root of 78766788 is about 428.6614006025.

Subtracting 78766788 from its reverse (88766787), we obtain a palindrome (9999999).

The spelling of 78766788 in words is "seventy-eight million, seven hundred sixty-six thousand, seven hundred eighty-eight".