1803491445 has 32 divisors (see below), whose sum is σ = 3300979968. Its totient is φ = 823661568.

The previous prime is 1803491399. The next prime is 1803491449. The reversal of 1803491445 is 5441943081.

It is not a de Polignac number, because 1803491445 - 2⁷ = 1803491317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803491449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109597 + ... + 124973.

It is an arithmetic number, because the mean of its divisors is an integer number (103155624).

Almost surely, 2^1803491445 is an apocalyptic number.

1803491445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1803491445 is a deficient number, since it is larger than the sum of its proper divisors (1497488523).

1803491445 is a wasteful number, since it uses less digits than its factorization.

1803491445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16509.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1803491445 is about 42467.5340112891. The cubic root of 1803491445 is about 1217.2263975704.

The spelling of 1803491445 in words is "one billion, eight hundred three million, four hundred ninety-one thousand, four hundred forty-five".