2198842 has 4 divisors (see below), whose sum is σ = 3298266. Its totient is φ = 1099420.

The previous prime is 2198827. The next prime is 2198843. The reversal of 2198842 is 2488912.

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

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 919681 = 1131^2 + 959^2 .

It is a super-2 number, since 2×2198842² = 9669812281928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2198798 and 2198807.

It is not an unprimeable number, because it can be changed into a prime (2198843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549709 + ... + 549712.

2^2198842 is an apocalyptic number.

2198842 is a deficient number, since it is larger than the sum of its proper divisors (1099424).

2198842 is a wasteful number, since it uses less digits than its factorization.

2198842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099423.

The product of its digits is 9216, while the sum is 34.

The square root of 2198842 is about 1482.8492843172. The cubic root of 2198842 is about 130.0363212121.

The spelling of 2198842 in words is "two million, one hundred ninety-eight thousand, eight hundred forty-two".