1089956 has 36 divisors (see below), whose sum is σ = 2279088. Its totient is φ = 454608.

The previous prime is 1089943. The next prime is 1089961. The reversal of 1089956 is 6599801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13091 + ... + 13173.

It is an arithmetic number, because the mean of its divisors is an integer number (63308).

2^1089956 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 1089956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1139544).

1089956 is an abundant number, since it is smaller than the sum of its proper divisors (1189132).

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

1089956 is a wasteful number, since it uses less digits than its factorization.

1089956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1089956 is about 1044.0095785001. The cubic root of 1089956 is about 102.9128618597.

The spelling of 1089956 in words is "one million, eighty-nine thousand, nine hundred fifty-six".