1804636 has 6 divisors (see below), whose sum is σ = 3158120. Its totient is φ = 902316.

The previous prime is 1804631. The next prime is 1804643. The reversal of 1804636 is 6364081.

It is a super-2 number, since 2×1804636² = 6513422184992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804631) by changing a digit.

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 as a sum of consecutive naturals, namely, 225576 + ... + 225583.

2^1804636 is an apocalyptic number.

It is an amenable number.

1804636 is a deficient number, since it is larger than the sum of its proper divisors (1353484).

1804636 is a wasteful number, since it uses less digits than its factorization.

1804636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451163 (or 451161 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1804636 is about 1343.3674106513. The cubic root of 1804636 is about 121.7483840422.

The spelling of 1804636 in words is "one million, eight hundred four thousand, six hundred thirty-six".