2218730 has 8 divisors (see below), whose sum is σ = 3993732. Its totient is φ = 887488.

The previous prime is 2218709. The next prime is 2218751. The reversal of 2218730 is 378122.

It is an interprime number because it is at equal distance from previous prime (2218709) and next prime (2218751).

It can be written as a sum of positive squares in 2 ways, for example, as 1874161 + 344569 = 1369^2 + 587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2218696 and 2218705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110927 + ... + 110946.

2^2218730 is an apocalyptic number.

2218730 is a deficient number, since it is larger than the sum of its proper divisors (1775002).

2218730 is a wasteful number, since it uses less digits than its factorization.

2218730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221880.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2218730 is about 1489.5401975106. The cubic root of 2218730 is about 130.4271942606.

The spelling of 2218730 in words is "two million, two hundred eighteen thousand, seven hundred thirty".