1098188 has 36 divisors (see below), whose sum is σ = 2413152. Its totient is φ = 433440.

The previous prime is 1098187. The next prime is 1098191. The reversal of 1098188 is 8818901.

It is not an unprimeable number, because it can be changed into a prime (1098187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2333 + ... + 2763.

It is an arithmetic number, because the mean of its divisors is an integer number (67032).

2^1098188 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 1098188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1206576).

1098188 is an abundant number, since it is smaller than the sum of its proper divisors (1314964).

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

1098188 is a wasteful number, since it uses less digits than its factorization.

1098188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1098188 is about 1047.9446550272. The cubic root of 1098188 is about 103.1712988311.

The spelling of 1098188 in words is "one million, ninety-eight thousand, one hundred eighty-eight".