1198188 has 36 divisors (see below), whose sum is σ = 3072888. Its totient is φ = 393600.

The previous prime is 1198187. The next prime is 1198189. The reversal of 1198188 is 8818911.

It is an interprime number because it is at equal distance from previous prime (1198187) and next prime (1198189).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1198187) 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, 2788 + ... + 3188.

It is an arithmetic number, because the mean of its divisors is an integer number (85358).

2^1198188 is an apocalyptic number.

1198188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1536444).

1198188 is an abundant number, since it is smaller than the sum of its proper divisors (1874700).

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

1198188 is a wasteful number, since it uses less digits than its factorization.

1198188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 489 counting only the distinct ones).

The product of its digits is 4608, while the sum is 36.

The square root of 1198188 is about 1094.6177414970. The cubic root of 1198188 is about 106.2123428258.

The spelling of 1198188 in words is "one million, one hundred ninety-eight thousand, one hundred eighty-eight".