1798218 has 12 divisors (see below), whose sum is σ = 3896178. Its totient is φ = 599400.

The previous prime is 1798211. The next prime is 1798241. The reversal of 1798218 is 8128971.

It can be written as a sum of positive squares in only one way, i.e., 1046529 + 751689 = 1023^2 + 867^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1798211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49933 + ... + 49968.

2^1798218 is an apocalyptic number.

1798218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1798218 is an abundant number, since it is smaller than the sum of its proper divisors (2097960).

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

1798218 is a wasteful number, since it uses less digits than its factorization.

1798218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99909 (or 99906 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1798218 is about 1340.9765098614. The cubic root of 1798218 is about 121.6038841240.

It can be divided in two parts, 1798 and 218, that added together give a triangular number (2016 = T₆₃).

The spelling of 1798218 in words is "one million, seven hundred ninety-eight thousand, two hundred eighteen".