2218398 has 64 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 548352.

The previous prime is 2218367. The next prime is 2218423. The reversal of 2218398 is 8938122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9163 + ... + 9401.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2^2218398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2218398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2903040).

2218398 is an abundant number, since it is smaller than the sum of its proper divisors (3587682).

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

2218398 is a wasteful number, since it uses less digits than its factorization.

2218398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its digits is 6912, while the sum is 33.

The square root of 2218398 is about 1489.4287495547. The cubic root of 2218398 is about 130.4206884385.

The spelling of 2218398 in words is "two million, two hundred eighteen thousand, three hundred ninety-eight".