2217860 has 24 divisors (see below), whose sum is σ = 4691736. Its totient is φ = 880640.

The previous prime is 2217857. The next prime is 2217863. The reversal of 2217860 is 687122.

2217860 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2217857) and next prime (2217863).

It can be written as a sum of positive squares in 4 ways, for example, as 1132096 + 1085764 = 1064^2 + 1042^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217863) 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, 3140 + ... + 3780.

It is an arithmetic number, because the mean of its divisors is an integer number (195489).

2^2217860 is an apocalyptic number.

2217860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2217860 is an abundant number, since it is smaller than the sum of its proper divisors (2473876).

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

2217860 is a wasteful number, since it uses less digits than its factorization.

2217860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2217860 is about 1489.2481324480. The cubic root of 2217860 is about 130.4101444929.

The spelling of 2217860 in words is "two million, two hundred seventeen thousand, eight hundred sixty".