1103845840 has 80 divisors (see below), whose sum is σ = 2627630928. Its totient is φ = 431095808.

The previous prime is 1103845817. The next prime is 1103845849. The reversal of 1103845840 is 485483011.

It can be written as a sum of positive squares in 8 ways, for example, as 11664 + 1103834176 = 108^2 + 33224^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1103845796 and 1103845805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103845849) 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, 1089174 + ... + 1090186.

Almost surely, 2^1103845840 is an apocalyptic number.

1103845840 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 1103845840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313815464).

1103845840 is an abundant number, since it is smaller than the sum of its proper divisors (1523785088).

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

1103845840 is a wasteful number, since it uses less digits than its factorization.

1103845840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 1103845840 is about 33224.1755352936. The cubic root of 1103845840 is about 1033.4817416628.

The spelling of 1103845840 in words is "one billion, one hundred three million, eight hundred forty-five thousand, eight hundred forty".