2198644 has 48 divisors (see below), whose sum is σ = 4838400. Its totient is φ = 852480.

The previous prime is 2198617. The next prime is 2198653. The reversal of 2198644 is 4468912.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14682 + ... + 14830.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2^2198644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2198644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419200).

2198644 is an abundant number, since it is smaller than the sum of its proper divisors (2639756).

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

2198644 is a wasteful number, since it uses less digits than its factorization.

2198644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 206 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 2198644 is about 1482.7825194546. The cubic root of 2198644 is about 130.0324179508.

The spelling of 2198644 in words is "two million, one hundred ninety-eight thousand, six hundred forty-four".