2216240 has 40 divisors (see below), whose sum is σ = 5551728. Its totient is φ = 817920.

The previous prime is 2216237. The next prime is 2216281. The reversal of 2216240 is 426122.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 2105.

2^2216240 is an apocalyptic number.

2216240 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 2216240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2775864).

2216240 is an abundant number, since it is smaller than the sum of its proper divisors (3335488).

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

2216240 is a wasteful number, since it uses less digits than its factorization.

2216240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157 (or 2151 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2216240 is about 1488.7041344740. The cubic root of 2216240 is about 130.3783847646.

The spelling of 2216240 in words is "two million, two hundred sixteen thousand, two hundred forty".