2220280 has 32 divisors (see below), whose sum is σ = 5106240. Its totient is φ = 868480.

The previous prime is 2220277. The next prime is 2220289. The reversal of 2220280 is 820222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220289) 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, 1290 + ... + 2470.

It is an arithmetic number, because the mean of its divisors is an integer number (159570).

2^2220280 is an apocalyptic number.

2220280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2220280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2553120).

2220280 is an abundant number, since it is smaller than the sum of its proper divisors (2885960).

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

2220280 is a wasteful number, since it uses less digits than its factorization.

2220280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2220280 is about 1490.0604014603. The cubic root of 2220280 is about 130.4575592431.

It can be divided in two parts, 2220 and 280, that added together give a square (2500 = 50²).

The spelling of 2220280 in words is "two million, two hundred twenty thousand, two hundred eighty".