1218988224 has 112 divisors (see below), whose sum is σ = 3739530240. Its totient is φ = 388650240.

The previous prime is 1218988223. The next prime is 1218988229. The reversal of 1218988224 is 4228898121.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1218988224.

It is not an unprimeable number, because it can be changed into a prime (1218988223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24409 + ... + 55079.

Almost surely, 2^1218988224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218988224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1869765120).

1218988224 is an abundant number, since it is smaller than the sum of its proper divisors (2520542016).

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

1218988224 is a wasteful number, since it uses less digits than its factorization.

1218988224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30715 (or 30699 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 1218988224 is about 34914.0118577055. The cubic root of 1218988224 is about 1068.2342624608.

The spelling of 1218988224 in words is "one billion, two hundred eighteen million, nine hundred eighty-eight thousand, two hundred twenty-four".