78788 has 6 divisors (see below), whose sum is σ = 137886. Its totient is φ = 39392.

The previous prime is 78787. The next prime is 78791. The reversal of 78788 is 88787.

It can be written as a sum of positive squares in only one way, i.e., 53824 + 24964 = 232^2 + 158^2 .

It is not an unprimeable number, because it can be changed into a prime (78781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9845 + ... + 9852.

It is an arithmetic number, because the mean of its divisors is an integer number (22981).

2⁷⁸⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

78788 is a deficient number, since it is larger than the sum of its proper divisors (59098).

78788 is a wasteful number, since it uses less digits than its factorization.

78788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19701 (or 19699 counting only the distinct ones).

The product of its digits is 25088, while the sum is 38.

The square root of 78788 is about 280.6920020236. The cubic root of 78788 is about 42.8699876842.

Subtracting 78788 from its reverse (88787), we obtain a palindrome (9999).

It can be divided in two parts, 7 and 8788, that multiplied together give a palindrome (61516).

The spelling of 78788 in words is "seventy-eight thousand, seven hundred eighty-eight".