2198668 has 6 divisors (see below), whose sum is σ = 3847676. Its totient is φ = 1099332.

The previous prime is 2198663. The next prime is 2198671. The reversal of 2198668 is 8668912.

It is a self number, because there is not a number n which added to its sum of digits gives 2198668.

It is not an unprimeable number, because it can be changed into a prime (2198663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274830 + ... + 274837.

2^2198668 is an apocalyptic number.

It is an amenable number.

2198668 is a deficient number, since it is larger than the sum of its proper divisors (1649008).

2198668 is a wasteful number, since it uses less digits than its factorization.

2198668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549671 (or 549669 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 2198668 is about 1482.7906123253. The cubic root of 2198668 is about 130.0328910859.

It can be divided in two parts, 21 and 98668, that added together give a palindrome (98689).

The spelling of 2198668 in words is "two million, one hundred ninety-eight thousand, six hundred sixty-eight".