978689448 has 96 divisors (see below), whose sum is σ = 2991362400. Its totient is φ = 286339200.

The previous prime is 978689443. The next prime is 978689471. The reversal of 978689448 is 844986879.

It is not an unprimeable number, because it can be changed into a prime (978689443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1663 + ... + 44273.

It is an arithmetic number, because the mean of its divisors is an integer number (31160025).

Almost surely, 2^978689448 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 978689448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495681200).

978689448 is an abundant number, since it is smaller than the sum of its proper divisors (2012672952).

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

978689448 is a wasteful number, since it uses less digits than its factorization.

978689448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42663 (or 42656 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The square root of 978689448 is about 31284.0126582253. The cubic root of 978689448 is about 992.8454166806.

The spelling of 978689448 in words is "nine hundred seventy-eight million, six hundred eighty-nine thousand, four hundred forty-eight".