1802218 has 8 divisors (see below), whose sum is σ = 2949120. Its totient is φ = 819180.

The previous prime is 1802197. The next prime is 1802219. The reversal of 1802218 is 8122081.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 81919 = 1802218 / (1 + 8 + 0 + 2 + 2 + 1 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1802219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40938 + ... + 40981.

It is an arithmetic number, because the mean of its divisors is an integer number (368640).

2^1802218 is an apocalyptic number.

1802218 is a deficient number, since it is larger than the sum of its proper divisors (1146902).

1802218 is a wasteful number, since it uses less digits than its factorization.

1802218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81932.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1802218 is about 1342.4671318137. The cubic root of 1802218 is about 121.6939835662.

Adding to 1802218 its reverse (8122081), we get a palindrome (9924299).

The spelling of 1802218 in words is "one million, eight hundred two thousand, two hundred eighteen".