2220385 has 8 divisors (see below), whose sum is σ = 2756520. Its totient is φ = 1714944.

The previous prime is 2220373. The next prime is 2220389. The reversal of 2220385 is 5830222.

It can be written as a sum of positive squares in 4 ways, for example, as 6241 + 2214144 = 79^2 + 1488^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2220385 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2220389) 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, 7512 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (344565).

2^2220385 is an apocalyptic number.

It is an amenable number.

2220385 is a deficient number, since it is larger than the sum of its proper divisors (536135).

2220385 is a wasteful number, since it uses less digits than its factorization.

2220385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15347.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2220385 is about 1490.0956345148. The cubic root of 2220385 is about 130.4596157146.

The spelling of 2220385 in words is "two million, two hundred twenty thousand, three hundred eighty-five".