978624 has 42 divisors (see below), whose sum is σ = 2806700. Its totient is φ = 326016.

The previous prime is 978619. The next prime is 978643. The reversal of 978624 is 426879.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978624.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 274 + ... + 1425.

2⁹⁷⁸⁶²⁴ is an apocalyptic number.

It is an amenable number.

978624 is an abundant number, since it is smaller than the sum of its proper divisors (1828076).

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

978624 is a wasteful number, since it uses less digits than its factorization.

978624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717 (or 1704 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 978624 is about 989.2542645852. The cubic root of 978624 is about 99.2823284636.

The spelling of 978624 in words is "nine hundred seventy-eight thousand, six hundred twenty-four".