1820804222 has 8 divisors (see below), whose sum is σ = 2735429616. Its totient is φ = 908994352.

The previous prime is 1820804221. The next prime is 1820804263. The reversal of 1820804222 is 2224080281.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820804221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702263 + ... + 704850.

It is an arithmetic number, because the mean of its divisors is an integer number (341928702).

Almost surely, 2^1820804222 is an apocalyptic number.

1820804222 is a deficient number, since it is larger than the sum of its proper divisors (914625394).

1820804222 is a wasteful number, since it uses less digits than its factorization.

1820804222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407762.

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 1820804222 is about 42670.8826016055. The cubic root of 1820804222 is about 1221.1089580785.

The spelling of 1820804222 in words is "one billion, eight hundred twenty million, eight hundred four thousand, two hundred twenty-two".