1980220 has 24 divisors (see below), whose sum is σ = 4537008. Its totient is φ = 720000.

The previous prime is 1980191. The next prime is 1980221. The reversal of 1980220 is 220891.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1980191 and 1980200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4281 + ... + 4720.

It is an arithmetic number, because the mean of its divisors is an integer number (189042).

2^1980220 is an apocalyptic number.

1980220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980220 is an abundant number, since it is smaller than the sum of its proper divisors (2556788).

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

1980220 is a wasteful number, since it uses less digits than its factorization.

1980220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9021 (or 9019 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1980220 is about 1407.2028993717. The cubic root of 1980220 is about 125.5753741597.

It can be divided in two parts, 1980 and 220, that multiplied together give a square (435600 = 660²).

The spelling of 1980220 in words is "one million, nine hundred eighty thousand, two hundred twenty".