1218798200 has 24 divisors (see below), whose sum is σ = 2833706280. Its totient is φ = 487519200.

The previous prime is 1218798199. The next prime is 1218798211. The reversal of 1218798200 is 28978121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3046796 + ... + 3047195.

It is an arithmetic number, because the mean of its divisors is an integer number (118071095).

Almost surely, 2^1218798200 is an apocalyptic number.

1218798200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1218798200 is an abundant number, since it is smaller than the sum of its proper divisors (1614908080).

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

1218798200 is a wasteful number, since it uses less digits than its factorization.

1218798200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094007 (or 6093998 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 1218798200 is about 34911.2904373356. The cubic root of 1218798200 is about 1068.1787517533.

The spelling of 1218798200 in words is "one billion, two hundred eighteen million, seven hundred ninety-eight thousand, two hundred".