1803528845 has 4 divisors (see below), whose sum is σ = 2164234620. Its totient is φ = 1442823072.

The previous prime is 1803528817. The next prime is 1803528863. The reversal of 1803528845 is 5488253081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 930799081 + 872729764 = 30509^2 + 29542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1803528845 - 2⁶ = 1803528781 is a prime.

It is a super-3 number, since 3×1803528845³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1803528796 and 1803528805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180352880 + ... + 180352889.

It is an arithmetic number, because the mean of its divisors is an integer number (541058655).

Almost surely, 2^1803528845 is an apocalyptic number.

It is an amenable number.

1803528845 is a deficient number, since it is larger than the sum of its proper divisors (360705775).

1803528845 is an equidigital number, since it uses as much as digits as its factorization.

1803528845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360705774.

The product of its (nonzero) digits is 307200, while the sum is 44.

The square root of 1803528845 is about 42467.9743453817. The cubic root of 1803528845 is about 1217.2348116113.

The spelling of 1803528845 in words is "one billion, eight hundred three million, five hundred twenty-eight thousand, eight hundred forty-five".