78908 has 6 divisors (see below), whose sum is σ = 138096. Its totient is φ = 39452.

The previous prime is 78901. The next prime is 78919. The reversal of 78908 is 80987.

Added to its reverse (80987) it gives a triangular number (159895 = T₅₆₅).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78901) by changing a digit.

78908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9860 + ... + 9867.

It is an arithmetic number, because the mean of its divisors is an integer number (23016).

2⁷⁸⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

78908 is a deficient number, since it is larger than the sum of its proper divisors (59188).

78908 is a wasteful number, since it uses less digits than its factorization.

78908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19731 (or 19729 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 78908 is about 280.9056781199. The cubic root of 78908 is about 42.8917413733.

Adding to 78908 its reverse (80987), we get a triangular number (159895 = T₅₆₅).

The spelling of 78908 in words is "seventy-eight thousand, nine hundred eight".