2198918 has 4 divisors (see below), whose sum is σ = 3298380. Its totient is φ = 1099458.

The previous prime is 2198909. The next prime is 2198981. The reversal of 2198918 is 8198912.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549728 + ... + 549731.

It is an arithmetic number, because the mean of its divisors is an integer number (824595).

2^2198918 is an apocalyptic number.

2198918 is a deficient number, since it is larger than the sum of its proper divisors (1099462).

2198918 is a wasteful number, since it uses less digits than its factorization.

2198918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099461.

The product of its digits is 10368, while the sum is 38.

The square root of 2198918 is about 1482.8749104358. The cubic root of 2198918 is about 130.0378193713.

The spelling of 2198918 in words is "two million, one hundred ninety-eight thousand, nine hundred eighteen".