2773220 has 12 divisors (see below), whose sum is σ = 5823804. Its totient is φ = 1109280.

The previous prime is 2773219. The next prime is 2773223. The reversal of 2773220 is 223772.

It can be written as a sum of positive squares in 2 ways, for example, as 1893376 + 879844 = 1376^2 + 938^2 .

It is not an unprimeable number, because it can be changed into a prime (2773223) 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, 69311 + ... + 69350.

It is an arithmetic number, because the mean of its divisors is an integer number (485317).

2^2773220 is an apocalyptic number.

2773220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2773220 is an abundant number, since it is smaller than the sum of its proper divisors (3050584).

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

2773220 is a wasteful number, since it uses less digits than its factorization.

2773220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138670 (or 138668 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 2773220 is about 1665.2987719926. The cubic root of 2773220 is about 140.4951852219.

Adding to 2773220 its reverse (223772), we get a palindrome (2996992).

The spelling of 2773220 in words is "two million, seven hundred seventy-three thousand, two hundred twenty".