978236 has 48 divisors (see below), whose sum is σ = 2150400. Its totient is φ = 388080.

The previous prime is 978233. The next prime is 978239. The reversal of 978236 is 632879.

It is an interprime number because it is at equal distance from previous prime (978233) and next prime (978239).

Its product of digits (18144) is a multiple of the sum of its prime divisors (63).

It is a junction number, because it is equal to n+sod(n) for n = 978196 and 978205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978233) 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 15 ways as a sum of consecutive naturals, for example, 31541 + ... + 31571.

It is an arithmetic number, because the mean of its divisors is an integer number (44800).

2⁹⁷⁸²³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075200).

978236 is an abundant number, since it is smaller than the sum of its proper divisors (1172164).

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

978236 is a wasteful number, since it uses less digits than its factorization.

978236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 63 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 978236 is about 989.0581378261. The cubic root of 978236 is about 99.2692057404.

The spelling of 978236 in words is "nine hundred seventy-eight thousand, two hundred thirty-six".