978888 has 16 divisors (see below), whose sum is σ = 2447280. Its totient is φ = 326288.

The previous prime is 978883. The next prime is 978907. The reversal of 978888 is 888879.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978888.

It is not an unprimeable number, because it can be changed into a prime (978883) by changing a digit.

978888 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20370 + ... + 20417.

It is an arithmetic number, because the mean of its divisors is an integer number (152955).

2⁹⁷⁸⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

978888 is an abundant number, since it is smaller than the sum of its proper divisors (1468392).

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

978888 is a wasteful number, since it uses less digits than its factorization.

978888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40796 (or 40792 counting only the distinct ones).

The product of its digits is 258048, while the sum is 48.

The square root of 978888 is about 989.3876894322. The cubic root of 978888 is about 99.2912553440.

Subtracting from 978888 its reverse (888879), we obtain a palindrome (90009).

The spelling of 978888 in words is "nine hundred seventy-eight thousand, eight hundred eighty-eight".