1804904 has 8 divisors (see below), whose sum is σ = 3384210. Its totient is φ = 902448.

The previous prime is 1804871. The next prime is 1804919. The reversal of 1804904 is 4094081.

It can be written as a sum of positive squares in only one way, i.e., 1716100 + 88804 = 1310^2 + 298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112799 + ... + 112814.

2^1804904 is an apocalyptic number.

It is an amenable number.

1804904 is a deficient number, since it is larger than the sum of its proper divisors (1579306).

1804904 is a wasteful number, since it uses less digits than its factorization.

1804904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225619 (or 225615 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1804904 is about 1343.4671562789. The cubic root of 1804904 is about 121.7544105488.

Adding to 1804904 its reverse (4094081), we get a palindrome (5898985).

The spelling of 1804904 in words is "one million, eight hundred four thousand, nine hundred four".