1803996 has 18 divisors (see below), whose sum is σ = 4560192. Its totient is φ = 601320.

The previous prime is 1803973. The next prime is 1804007. The reversal of 1803996 is 6993081.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 50111 = 1803996 / (1 + 8 + 0 + 3 + 9 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1803996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25020 + ... + 25091.

It is an arithmetic number, because the mean of its divisors is an integer number (253344).

2^1803996 is an apocalyptic number.

It is an amenable number.

1803996 is an abundant number, since it is smaller than the sum of its proper divisors (2756196).

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

1803996 is a wasteful number, since it uses less digits than its factorization.

1803996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50121 (or 50116 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1803996 is about 1343.1291821712. The cubic root of 1803996 is about 121.7339899708.

The spelling of 1803996 in words is "one million, eight hundred three thousand, nine hundred ninety-six".