978144 has 48 divisors (see below), whose sum is σ = 2685312. Its totient is φ = 311168.

The previous prime is 978113. The next prime is 978149. The reversal of 978144 is 441879.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978144.

It is not an unprimeable number, because it can be changed into a prime (978149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1987 + ... + 2429.

It is an arithmetic number, because the mean of its divisors is an integer number (55944).

2⁹⁷⁸¹⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342656).

978144 is an abundant number, since it is smaller than the sum of its proper divisors (1707168).

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

978144 is a wasteful number, since it uses less digits than its factorization.

978144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 471 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 978144 is about 989.0116278386. The cubic root of 978144 is about 99.2660936580.

The spelling of 978144 in words is "nine hundred seventy-eight thousand, one hundred forty-four".