978825 has 24 divisors (see below), whose sum is σ = 1674496. Its totient is φ = 504000.

The previous prime is 978821. The next prime is 978839. The reversal of 978825 is 528879.

It is not a de Polignac number, because 978825 - 2² = 978821 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978825.

It is not an unprimeable number, because it can be changed into a prime (978821) 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 23 ways as a sum of consecutive naturals, for example, 2115 + ... + 2535.

2⁹⁷⁸⁸²⁵ is an apocalyptic number.

It is an amenable number.

978825 is a deficient number, since it is larger than the sum of its proper divisors (695671).

978825 is a wasteful number, since it uses less digits than its factorization.

978825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 460 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 978825 is about 989.3558510465. The cubic root of 978825 is about 99.2891252115.

The spelling of 978825 in words is "nine hundred seventy-eight thousand, eight hundred twenty-five".