1804220605 has 8 divisors (see below), whose sum is σ = 2361888864. Its totient is φ = 1312160400.

The previous prime is 1804220599. The next prime is 1804220609. The reversal of 1804220605 is 5060224081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1804220605 - 2⁵ = 1804220573 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16401951 + ... + 16402060.

It is an arithmetic number, because the mean of its divisors is an integer number (295236108).

Almost surely, 2^1804220605 is an apocalyptic number.

It is an amenable number.

1804220605 is a deficient number, since it is larger than the sum of its proper divisors (557668259).

1804220605 is a wasteful number, since it uses less digits than its factorization.

1804220605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32804027.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1804220605 is about 42476.1180547375. The cubic root of 1804220605 is about 1217.3904189034.

Adding to 1804220605 its reverse (5060224081), we get a palindrome (6864444686).

The spelling of 1804220605 in words is "one billion, eight hundred four million, two hundred twenty thousand, six hundred five".