1189644 has 12 divisors (see below), whose sum is σ = 2775864. Its totient is φ = 396544.

The previous prime is 1189637. The next prime is 1189649. The reversal of 1189644 is 4469811.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1189649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49557 + ... + 49580.

It is an arithmetic number, because the mean of its divisors is an integer number (231322).

2^1189644 is an apocalyptic number.

It is an amenable number.

1189644 is an abundant number, since it is smaller than the sum of its proper divisors (1586220).

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

1189644 is a wasteful number, since it uses less digits than its factorization.

1189644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99144 (or 99142 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1189644 is about 1090.7080269256. The cubic root of 1189644 is about 105.9592818569.

The spelling of 1189644 in words is "one million, one hundred eighty-nine thousand, six hundred forty-four".