1085440 has 52 divisors (see below), whose sum is σ = 2653884. Its totient is φ = 425984.

The previous prime is 1085431. The next prime is 1085443. The reversal of 1085440 is 445801.

It can be written as a sum of positive squares in 2 ways, for example, as 589824 + 495616 = 768^2 + 704^2 .

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20454 + ... + 20506.

2^1085440 is an apocalyptic number.

1085440 is a gapful number since it is divisible by the number (10) 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 1085440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1326942).

1085440 is an abundant number, since it is smaller than the sum of its proper divisors (1568444).

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

1085440 is an frugal number, since it uses more digits than its factorization.

1085440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1085440 is about 1041.8445181504. The cubic root of 1085440 is about 102.7705326170.

The spelling of 1085440 in words is "one million, eighty-five thousand, four hundred forty".