68878 has 4 divisors (see below), whose sum is σ = 103320. Its totient is φ = 34438.

The previous prime is 68863. The next prime is 68879. The reversal of 68878 is 87886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87886 = 2 ⋅43943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68879) by changing a digit.

68878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17218 + ... + 17221.

It is an arithmetic number, because the mean of its divisors is an integer number (25830).

2⁶⁸⁸⁷⁸ is an apocalyptic number.

68878 is a deficient number, since it is larger than the sum of its proper divisors (34442).

68878 is a wasteful number, since it uses less digits than its factorization.

68878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34441.

The product of its digits is 21504, while the sum is 37.

The square root of 68878 is about 262.4461849599. The cubic root of 68878 is about 40.9914715555.

Subtracting from 68878 its product of digits (21504), we obtain a palindrome (47374).

It can be divided in two parts, 68 and 878, that added together give a triangular number (946 = T₄₃).

The spelling of 68878 in words is "sixty-eight thousand, eight hundred seventy-eight".