1804220604 has 18 divisors (see below), whose sum is σ = 4560668840. Its totient is φ = 601406856.

The previous prime is 1804220599. The next prime is 1804220609. The reversal of 1804220604 is 4060224081.

1804220604 is a `hidden beast` number, since 18 + 0 + 42 + 2 + 0 + 604 = 666.

It is an interprime number because it is at equal distance from previous prime (1804220599) and next prime (1804220609).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804220609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25058584 + ... + 25058655.

Almost surely, 2^1804220604 is an apocalyptic number.

It is an amenable number.

1804220604 is an abundant number, since it is smaller than the sum of its proper divisors (2756448236).

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

1804220604 is a wasteful number, since it uses less digits than its factorization.

1804220604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50117249 (or 50117244 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1804220604 is about 42476.1180429662. The cubic root of 1804220604 is about 1217.3904186785.

Adding to 1804220604 its reverse (4060224081), we get a palindrome (5864444685).

The spelling of 1804220604 in words is "one billion, eight hundred four million, two hundred twenty thousand, six hundred four".