978726 has 24 divisors (see below), whose sum is σ = 2277720. Its totient is φ = 279552.

The previous prime is 978713. The next prime is 978727. The reversal of 978726 is 627879.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978727) by changing a digit.

978726 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 11 ways as a sum of consecutive naturals, for example, 1371 + ... + 1958.

It is an arithmetic number, because the mean of its divisors is an integer number (94905).

2⁹⁷⁸⁷²⁶ is an apocalyptic number.

978726 is an abundant number, since it is smaller than the sum of its proper divisors (1298994).

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

978726 is a wasteful number, since it uses less digits than its factorization.

978726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348 (or 3341 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 978726 is about 989.3058172274. The cubic root of 978726 is about 99.2857776759.

The spelling of 978726 in words is "nine hundred seventy-eight thousand, seven hundred twenty-six".