2217940 has 24 divisors (see below), whose sum is σ = 4767840. Its totient is φ = 866208.

The previous prime is 2217911. The next prime is 2217947. The reversal of 2217940 is 497122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217947) 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, 430 + ... + 2149.

It is an arithmetic number, because the mean of its divisors is an integer number (198660).

2^2217940 is an apocalyptic number.

2217940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2217940 is an abundant number, since it is smaller than the sum of its proper divisors (2549900).

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

2217940 is a wasteful number, since it uses less digits than its factorization.

2217940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2217940 is about 1489.2749913968. The cubic root of 2217940 is about 130.4117124737.

The spelling of 2217940 in words is "two million, two hundred seventeen thousand, nine hundred forty".