1803216 has 20 divisors (see below), whose sum is σ = 4658432. Its totient is φ = 601056.

The previous prime is 1803211. The next prime is 1803227. The reversal of 1803216 is 6123081.

It is a junction number, because it is equal to n+sod(n) for n = 1803192 and 1803201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18736 + ... + 18831.

2^1803216 is an apocalyptic number.

1803216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1803216 is an abundant number, since it is smaller than the sum of its proper divisors (2855216).

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

1803216 is a wasteful number, since it uses less digits than its factorization.

1803216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37578 (or 37572 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1803216 is about 1342.8387840690. The cubic root of 1803216 is about 121.7164425925.

Adding to 1803216 its reverse (6123081), we get a palindrome (7926297).

The spelling of 1803216 in words is "one million, eight hundred three thousand, two hundred sixteen".