1803538 has 16 divisors (see below), whose sum is σ = 2994336. Its totient is φ = 807840.

The previous prime is 1803533. The next prime is 1803541. The reversal of 1803538 is 8353081.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1803533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045 + ... + 2167.

It is an arithmetic number, because the mean of its divisors is an integer number (187146).

2^1803538 is an apocalyptic number.

1803538 is a deficient number, since it is larger than the sum of its proper divisors (1190798).

1803538 is a wasteful number, since it uses less digits than its factorization.

1803538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1803538 is about 1342.9586739733. The cubic root of 1803538 is about 121.7236871234.

The spelling of 1803538 in words is "one million, eight hundred three thousand, five hundred thirty-eight".