1091968 has 32 divisors (see below), whose sum is σ = 2295000. Its totient is φ = 516096.

The previous prime is 1091957. The next prime is 1091983. The reversal of 1091968 is 8691901.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1091968² = 2384788226048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208 + ... + 2656.

2^1091968 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 1091968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1147500).

1091968 is an abundant number, since it is smaller than the sum of its proper divisors (1203032).

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

1091968 is an equidigital number, since it uses as much as digits as its factorization.

1091968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1091968 is about 1044.9727269168. The cubic root of 1091968 is about 102.9761467999.

The spelling of 1091968 in words is "one million, ninety-one thousand, nine hundred sixty-eight".