1189800 has 72 divisors (see below), whose sum is σ = 4001790. Its totient is φ = 316800.

The previous prime is 1189789. The next prime is 1189801. The reversal of 1189800 is 89811.

It can be written as a sum of positive squares in 3 ways, for example, as 1028196 + 161604 = 1014^2 + 402^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (1189801) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1470 + ... + 2130.

2^1189800 is an apocalyptic number.

1189800 is a gapful number since it is divisible by the number (10) 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 1189800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2000895).

1189800 is an abundant number, since it is smaller than the sum of its proper divisors (2811990).

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

1189800 is a wasteful number, since it uses less digits than its factorization.

1189800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1189800 is about 1090.7795377619. The cubic root of 1189800 is about 105.9639131936.

The spelling of 1189800 in words is "one million, one hundred eighty-nine thousand, eight hundred".