978894 has 48 divisors (see below), whose sum is σ = 2572128. Its totient is φ = 262656.

The previous prime is 978883. The next prime is 978907. The reversal of 978894 is 498879.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1914 + ... + 2370.

It is an arithmetic number, because the mean of its divisors is an integer number (53586).

2⁹⁷⁸⁸⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286064).

978894 is an abundant number, since it is smaller than the sum of its proper divisors (1593234).

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

978894 is a wasteful number, since it uses less digits than its factorization.

978894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 486 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 978894 is about 989.3907216060. The cubic root of 978894 is about 99.2914582090.

The spelling of 978894 in words is "nine hundred seventy-eight thousand, eight hundred ninety-four".