1863804 has 12 divisors (see below), whose sum is σ = 4348904. Its totient is φ = 621264.

The previous prime is 1863787. The next prime is 1863811. The reversal of 1863804 is 4083681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77647 + ... + 77670.

2^1863804 is an apocalyptic number.

It is an amenable number.

1863804 is an abundant number, since it is smaller than the sum of its proper divisors (2485100).

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

1863804 is a wasteful number, since it uses less digits than its factorization.

1863804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155324 (or 155322 counting only the distinct ones).

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

The square root of 1863804 is about 1365.2120714380. The cubic root of 1863804 is about 123.0646761452.

The spelling of 1863804 in words is "one million, eight hundred sixty-three thousand, eight hundred four".