978500 has 48 divisors (see below), whose sum is σ = 2271360. Its totient is φ = 367200.

The previous prime is 978491. The next prime is 978511. The reversal of 978500 is 5879.

It is a happy number.

978500 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9449 + ... + 9551.

It is an arithmetic number, because the mean of its divisors is an integer number (47320).

2⁹⁷⁸⁵⁰⁰ 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 978500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135680).

978500 is an abundant number, since it is smaller than the sum of its proper divisors (1292860).

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

978500 is a wasteful number, since it uses less digits than its factorization.

978500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 978500 is about 989.1915891272. The cubic root of 978500 is about 99.2781349808.

The spelling of 978500 in words is "nine hundred seventy-eight thousand, five hundred".