1818228842 has 8 divisors (see below), whose sum is σ = 2773569600. Its totient is φ = 893705644.

The previous prime is 1818228809. The next prime is 1818228857. The reversal of 1818228842 is 2488228181.

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

It is a super-2 number, since 2×1818228842² = 6611912243761321928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1818228793 and 1818228802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7704242 + ... + 7704477.

It is an arithmetic number, because the mean of its divisors is an integer number (346696200).

Almost surely, 2^1818228842 is an apocalyptic number.

1818228842 is a deficient number, since it is larger than the sum of its proper divisors (955340758).

1818228842 is a wasteful number, since it uses less digits than its factorization.

1818228842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15408780.

The product of its digits is 131072, while the sum is 44.

The square root of 1818228842 is about 42640.6946707016. The cubic root of 1818228842 is about 1220.5329665443.

The spelling of 1818228842 in words is "one billion, eight hundred eighteen million, two hundred twenty-eight thousand, eight hundred forty-two".