1105840 has 40 divisors (see below), whose sum is σ = 2687328. Its totient is φ = 422400.

The previous prime is 1105823. The next prime is 1105847. The reversal of 1105840 is 485011.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1105847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1540 + ... + 2140.

2^1105840 is an apocalyptic number.

1105840 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 1105840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343664).

1105840 is an abundant number, since it is smaller than the sum of its proper divisors (1581488).

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

1105840 is a wasteful number, since it uses less digits than its factorization.

1105840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1105840 is about 1051.5892734333. The cubic root of 1105840 is about 103.4103715027.

The spelling of 1105840 in words is "one million, one hundred five thousand, eight hundred forty".