978826 has 8 divisors (see below), whose sum is σ = 1554660. Its totient is φ = 460608.

The previous prime is 978821. The next prime is 978839. The reversal of 978826 is 628879.

It can be written as a sum of positive squares in 2 ways, for example, as 855625 + 123201 = 925^2 + 351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 14361 + ... + 14428.

2⁹⁷⁸⁸²⁶ is an apocalyptic number.

978826 is a deficient number, since it is larger than the sum of its proper divisors (575834).

978826 is a wasteful number, since it uses less digits than its factorization.

978826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28808.

The product of its digits is 48384, while the sum is 40.

The square root of 978826 is about 989.3563564257. The cubic root of 978826 is about 99.2891590239.

The spelling of 978826 in words is "nine hundred seventy-eight thousand, eight hundred twenty-six".