2213440 has 28 divisors (see below), whose sum is σ = 5271516. Its totient is φ = 885248.

The previous prime is 2213423. The next prime is 2213441. The reversal of 2213440 is 443122.

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 1098304 = 1056^2 + 1048^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (2213441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3139 + ... + 3778.

2^2213440 is an apocalyptic number.

2213440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2213440 is an abundant number, since it is smaller than the sum of its proper divisors (3058076).

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

2213440 is an equidigital number, since it uses as much as digits as its factorization.

2213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6934 (or 6924 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2213440 is about 1487.7634220534. The cubic root of 2213440 is about 130.3234548947.

Adding to 2213440 its reverse (443122), we get a palindrome (2656562).

The spelling of 2213440 in words is "two million, two hundred thirteen thousand, four hundred forty".