1803864 has 16 divisors (see below), whose sum is σ = 4509720. Its totient is φ = 601280.

The previous prime is 1803863. The next prime is 1803881. The reversal of 1803864 is 4683081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803863) 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, 37557 + ... + 37604.

2^1803864 is an apocalyptic number.

It is an amenable number.

1803864 is an abundant number, since it is smaller than the sum of its proper divisors (2705856).

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

1803864 is a wasteful number, since it uses less digits than its factorization.

1803864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75170 (or 75166 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1803864 is about 1343.0800422909. The cubic root of 1803864 is about 121.7310207700.

The spelling of 1803864 in words is "one million, eight hundred three thousand, eight hundred sixty-four".