1818449628 has 24 divisors (see below), whose sum is σ = 4245348240. Its totient is φ = 605821440.

The previous prime is 1818449609. The next prime is 1818449639. The reversal of 1818449628 is 8269448181.

It is a congruent number.

It is an unprimeable number.

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, 17443 + ... + 62778.

It is an arithmetic number, because the mean of its divisors is an integer number (176889510).

Almost surely, 2^1818449628 is an apocalyptic number.

It is an amenable number.

1818449628 is an abundant number, since it is smaller than the sum of its proper divisors (2426898612).

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

1818449628 is a wasteful number, since it uses less digits than its factorization.

1818449628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82117 (or 82115 counting only the distinct ones).

The product of its digits is 884736, while the sum is 51.

The square root of 1818449628 is about 42643.2835039705. The cubic root of 1818449628 is about 1220.5823673088.

The spelling of 1818449628 in words is "one billion, eight hundred eighteen million, four hundred forty-nine thousand, six hundred twenty-eight".