978816 has 32 divisors (see below), whose sum is σ = 2601000. Its totient is φ = 326144.

The previous prime is 978799. The next prime is 978821. The reversal of 978816 is 618879.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891 + ... + 1658.

2⁹⁷⁸⁸¹⁶ is an apocalyptic number.

978816 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

978816 is an abundant number, since it is smaller than the sum of its proper divisors (1622184).

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

978816 is a wasteful number, since it uses less digits than its factorization.

978816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566 (or 2554 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 978816 is about 989.3513026221. The cubic root of 978816 is about 99.2888208994.

The spelling of 978816 in words is "nine hundred seventy-eight thousand, eight hundred sixteen".