1089396 has 96 divisors (see below), whose sum is σ = 3548160. Its totient is φ = 280800.

The previous prime is 1089383. The next prime is 1089397. The reversal of 1089396 is 6939801.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1089396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8251 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (36960).

2^1089396 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 1089396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1774080).

1089396 is an abundant number, since it is smaller than the sum of its proper divisors (2458764).

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

1089396 is a wasteful number, since it uses less digits than its factorization.

1089396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1089396 is about 1043.7413472695. The cubic root of 1089396 is about 102.8952339079.

It can be divided in two parts, 1089 and 396, that added together give a triangular number (1485 = T₅₄).

The spelling of 1089396 in words is "one million, eighty-nine thousand, three hundred ninety-six".