978843324240 has 60 divisors (see below), whose sum is σ = 3287282166324. Its totient is φ = 261024886272.

The previous prime is 978843324143. The next prime is 978843324293. The reversal of 978843324240 is 42423348879.

978843324240 is a `hidden beast` number, since 9 + 78 + 8 + 4 + 3 + 324 + 240 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 485803424016 + 493039900224 = 696996^2 + 702168^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679751589 + ... + 679753028.

Almost surely, 2^978843324240 is an apocalyptic number.

978843324240 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

978843324240 is an abundant number, since it is smaller than the sum of its proper divisors (2308438842084).

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

978843324240 is a wasteful number, since it uses less digits than its factorization.

978843324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359504636 (or 1359504627 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 978843324240 in words is "nine hundred seventy-eight billion, eight hundred forty-three million, three hundred twenty-four thousand, two hundred forty".