2220618 has 8 divisors (see below), whose sum is σ = 4441248. Its totient is φ = 740204.

The previous prime is 2220553. The next prime is 2220643. The reversal of 2220618 is 8160222.

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

2220618 is an admirable number.

It is a super-2 number, since 2×2220618² = 9862288603848, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2220594 and 2220603.

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, 185046 + ... + 185057.

It is an arithmetic number, because the mean of its divisors is an integer number (555156).

2^2220618 is an apocalyptic number.

2220618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2220618 is a wasteful number, since it uses less digits than its factorization.

2220618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370108.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 2220618 is about 1490.1738153652. The cubic root of 2220618 is about 130.4641788913.

The spelling of 2220618 in words is "two million, two hundred twenty thousand, six hundred eighteen".