1995804 has 18 divisors (see below), whose sum is σ = 5045040. Its totient is φ = 665256.

The previous prime is 1995797. The next prime is 1995827. The reversal of 1995804 is 4085991.

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

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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: 55439 = 1995804 / (1 + 9 + 9 + 5 + 8 + 0 + 4).

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 5 ways as a sum of consecutive naturals, for example, 27684 + ... + 27755.

It is an arithmetic number, because the mean of its divisors is an integer number (280280).

2^1995804 is an apocalyptic number.

It is an amenable number.

1995804 is an abundant number, since it is smaller than the sum of its proper divisors (3049236).

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

1995804 is a wasteful number, since it uses less digits than its factorization.

1995804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55449 (or 55444 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1995804 is about 1412.7292734279. The cubic root of 1995804 is about 125.9039328202.

The spelling of 1995804 in words is "one million, nine hundred ninety-five thousand, eight hundred four".