1091448 has 64 divisors (see below), whose sum is σ = 3148800. Its totient is φ = 349920.

The previous prime is 1091443. The next prime is 1091459. The reversal of 1091448 is 8441901.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6615 + ... + 6777.

It is an arithmetic number, because the mean of its divisors is an integer number (49200).

2^1091448 is an apocalyptic number.

1091448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574400).

1091448 is an abundant number, since it is smaller than the sum of its proper divisors (2057352).

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

1091448 is a wasteful number, since it uses less digits than its factorization.

1091448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1091448 is about 1044.7238869673. The cubic root of 1091448 is about 102.9597983054.

The spelling of 1091448 in words is "one million, ninety-one thousand, four hundred forty-eight".