1218110900 has 72 divisors (see below), whose sum is σ = 2872316160. Its totient is φ = 446688000.

The previous prime is 1218110897. The next prime is 1218110941. The reversal of 1218110900 is 90118121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48560 + ... + 69240.

It is an arithmetic number, because the mean of its divisors is an integer number (39893280).

Almost surely, 2^1218110900 is an apocalyptic number.

1218110900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218110900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436158080).

1218110900 is an abundant number, since it is smaller than the sum of its proper divisors (1654205260).

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

1218110900 is a wasteful number, since it uses less digits than its factorization.

1218110900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20745 (or 20738 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 1218110900 is about 34901.4455288030. The cubic root of 1218110900 is about 1067.9779262459.

The spelling of 1218110900 in words is "one billion, two hundred eighteen million, one hundred ten thousand, nine hundred".