978834 has 32 divisors (see below), whose sum is σ = 2104704. Its totient is φ = 302720.

The previous prime is 978821. The next prime is 978839. The reversal of 978834 is 438879.

It is a junction number, because it is equal to n+sod(n) for n = 978792 and 978801.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978834.

It is not an unprimeable number, because it can be changed into a prime (978839) by changing a digit.

978834 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 15 ways as a sum of consecutive naturals, for example, 5572 + ... + 5744.

It is an arithmetic number, because the mean of its divisors is an integer number (65772).

2⁹⁷⁸⁸³⁴ is an apocalyptic number.

978834 is an abundant number, since it is smaller than the sum of its proper divisors (1125870).

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

978834 is a wasteful number, since it uses less digits than its factorization.

978834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242.

The product of its digits is 48384, while the sum is 39.

The square root of 978834 is about 989.3603994501. The cubic root of 978834 is about 99.2894295218.

The spelling of 978834 in words is "nine hundred seventy-eight thousand, eight hundred thirty-four".