1111840 has 24 divisors (see below), whose sum is σ = 2627100. Its totient is φ = 444672.

The previous prime is 1111801. The next prime is 1111841. The reversal of 1111840 is 481111.

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 21904 = 1044^2 + 148^2 .

It is a super-3 number, since 3×1111840³ = 4123330416832512000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1111841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3315 + ... + 3634.

2^1111840 is an apocalyptic number.

1111840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111840 is an abundant number, since it is smaller than the sum of its proper divisors (1515260).

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

1111840 is an equidigital number, since it uses as much as digits as its factorization.

1111840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964 (or 6956 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1111840 is about 1054.4382390638. The cubic root of 1111840 is about 103.5970601870.

Adding to 1111840 its reverse (481111), we get a palindrome (1592951).

The spelling of 1111840 in words is "one million, one hundred eleven thousand, eight hundred forty".