1105843280 has 20 divisors (see below), whose sum is σ = 2571085812. Its totient is φ = 442337280.

The previous prime is 1105843261. The next prime is 1105843303. The reversal of 1105843280 is 823485011.

It can be written as a sum of positive squares in 2 ways, for example, as 629207056 + 476636224 = 25084^2 + 21832^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6911441 + ... + 6911600.

Almost surely, 2^1105843280 is an apocalyptic number.

1105843280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1105843280 is an abundant number, since it is smaller than the sum of its proper divisors (1465242532).

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

1105843280 is a wasteful number, since it uses less digits than its factorization.

1105843280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13823054 (or 13823048 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1105843280 is about 33254.2219875913. The cubic root of 1105843280 is about 1034.1047374347.

The spelling of 1105843280 in words is "one billion, one hundred five million, eight hundred forty-three thousand, two hundred eighty".