1089156 has 48 divisors (see below), whose sum is σ = 2842560. Its totient is φ = 322560.

The previous prime is 1089133. The next prime is 1089161. The reversal of 1089156 is 6519801.

1089156 = T₁₆ + T₁₇ + ... + T₁₈₆.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3736 + ... + 4016.

It is an arithmetic number, because the mean of its divisors is an integer number (59220).

2^1089156 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 1089156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1421280).

1089156 is an abundant number, since it is smaller than the sum of its proper divisors (1753404).

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

1089156 is a wasteful number, since it uses less digits than its factorization.

1089156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1089156 is about 1043.6263699236. The cubic root of 1089156 is about 102.8876772221.

The spelling of 1089156 in words is "one million, eighty-nine thousand, one hundred fifty-six".