978220 has 24 divisors (see below), whose sum is σ = 2091600. Its totient is φ = 384192.

The previous prime is 978217. The next prime is 978223. The reversal of 978220 is 22879.

It is an interprime number because it is at equal distance from previous prime (978217) and next prime (978223).

It is not an unprimeable number, because it can be changed into a prime (978223) 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, 766 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (87150).

2⁹⁷⁸²²⁰ is an apocalyptic number.

It is an amenable number.

978220 is an abundant number, since it is smaller than the sum of its proper divisors (1113380).

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

978220 is a wasteful number, since it uses less digits than its factorization.

978220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 978220 is about 989.0500492897. The cubic root of 978220 is about 99.2686645227.

The spelling of 978220 in words is "nine hundred seventy-eight thousand, two hundred twenty".