978044544 has 320 divisors, whose sum is σ = 3199046400. Its totient is φ = 295280640.

The previous prime is 978044539. The next prime is 978044549. The reversal of 978044544 is 445440879.

978044544 is a `hidden beast` number, since 97 + 80 + 445 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (978044539) and next prime (978044549).

It is a super-2 number, since 2×978044544² = 1913142260096335872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 978044544.

It is not an unprimeable number, because it can be changed into a prime (978044549) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 5463847 + ... + 5464025.

It is an arithmetic number, because the mean of its divisors is an integer number (9997020).

Almost surely, 2^978044544 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 978044544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599523200).

978044544 is an abundant number, since it is smaller than the sum of its proper divisors (2221001856).

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

978044544 is a wasteful number, since it uses less digits than its factorization.

978044544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 978044544 is about 31273.7037141430. The cubic root of 978044544 is about 992.6272914206.

The spelling of 978044544 in words is "nine hundred seventy-eight million, forty-four thousand, five hundred forty-four".