978481784 has 96 divisors (see below), whose sum is σ = 2271564000. Its totient is φ = 392620032.

The previous prime is 978481781. The next prime is 978481789. The reversal of 978481784 is 487184879.

It is a happy number.

978481784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978481781) 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, 2392172 + ... + 2392580.

It is an arithmetic number, because the mean of its divisors is an integer number (23662125).

Almost surely, 2^978481784 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 978481784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135782000).

978481784 is an abundant number, since it is smaller than the sum of its proper divisors (1293082216).

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

978481784 is a wasteful number, since it uses less digits than its factorization.

978481784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 794 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 56.

The square root of 978481784 is about 31280.6934705738. The cubic root of 978481784 is about 992.7751891481.

The spelling of 978481784 in words is "nine hundred seventy-eight million, four hundred eighty-one thousand, seven hundred eighty-four".