978536 has 24 divisors (see below), whose sum is σ = 1996470. Its totient is φ = 446976.

The previous prime is 978521. The next prime is 978541. The reversal of 978536 is 635879.

978536 = 139² + 140² + ... + 177².

It can be written as a sum of positive squares in 3 ways, for example, as 630436 + 348100 = 794^2 + 590^2 .

Its product of digits (45360) is a multiple of the sum of its prime divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 978536.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10040 + ... + 10136.

2⁹⁷⁸⁵³⁶ 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 978536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998235).

978536 is an abundant number, since it is smaller than the sum of its proper divisors (1017934).

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

978536 is a wasteful number, since it uses less digits than its factorization.

978536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 112 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 978536 is about 989.2097856370. The cubic root of 978536 is about 99.2793524801.

The spelling of 978536 in words is "nine hundred seventy-eight thousand, five hundred thirty-six".