2217960 has 96 divisors (see below), whose sum is σ = 7399080. Its totient is φ = 576000.

The previous prime is 2217947. The next prime is 2217967. The reversal of 2217960 is 697122.

It can be written as a sum of positive squares in 4 ways, for example, as 1758276 + 459684 = 1326^2 + 678^2 .

It is not an unprimeable number, because it can be changed into a prime (2217967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21910 + ... + 22010.

2^2217960 is an apocalyptic number.

2217960 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 2217960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3699540).

2217960 is an abundant number, since it is smaller than the sum of its proper divisors (5181120).

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

2217960 is a wasteful number, since it uses less digits than its factorization.

2217960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 2217960 is about 1489.2817060583. The cubic root of 2217960 is about 130.4121044631.

The spelling of 2217960 in words is "two million, two hundred seventeen thousand, nine hundred sixty".