2216440 has 16 divisors (see below), whose sum is σ = 4987080. Its totient is φ = 886560.

The previous prime is 2216437. The next prime is 2216471. The reversal of 2216440 is 446122.

2216440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27666 + ... + 27745.

2^2216440 is an apocalyptic number.

2216440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2216440 is an abundant number, since it is smaller than the sum of its proper divisors (2770640).

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

2216440 is a wasteful number, since it uses less digits than its factorization.

2216440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55422 (or 55418 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2216440 is about 1488.7713054731. The cubic root of 2216440 is about 130.3823065559.

The spelling of 2216440 in words is "two million, two hundred sixteen thousand, four hundred forty".