9780220 has 12 divisors (see below), whose sum is σ = 20538504. Its totient is φ = 3912080.

The previous prime is 9780217. The next prime is 9780227. The reversal of 9780220 is 220879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9780227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244486 + ... + 244525.

It is an arithmetic number, because the mean of its divisors is an integer number (1711542).

Almost surely, 2^9780220 is an apocalyptic number.

It is an amenable number.

9780220 is an abundant number, since it is smaller than the sum of its proper divisors (10758284).

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

9780220 is a wasteful number, since it uses less digits than its factorization.

9780220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489020 (or 489018 counting only the distinct ones).

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

The square root of 9780220 is about 3127.3343281459. The cubic root of 9780220 is about 213.8534239532.

It can be divided in two parts, 9780 and 220, that added together give a 4-th power (10000 = 10⁴).

The spelling of 9780220 in words is "nine million, seven hundred eighty thousand, two hundred twenty".