978520 has 32 divisors (see below), whose sum is σ = 2332800. Its totient is φ = 368128.

The previous prime is 978511. The next prime is 978521. The reversal of 978520 is 25879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2⁹⁷⁸⁵²⁰ 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 978520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1166400).

978520 is an abundant number, since it is smaller than the sum of its proper divisors (1354280).

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

978520 is a wasteful number, since it uses less digits than its factorization.

978520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 978520 is about 989.2016983406. The cubic root of 978520 is about 99.2788113730.

The spelling of 978520 in words is "nine hundred seventy-eight thousand, five hundred twenty".