1218885888 has 144 divisors (see below), whose sum is σ = 3560288256. Its totient is φ = 367134720.

The previous prime is 1218885887. The next prime is 1218885901. The reversal of 1218885888 is 8885888121.

It is a super-3 number, since 3×1218885888³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1218885881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1883581 + ... + 1884227.

It is an arithmetic number, because the mean of its divisors is an integer number (24724224).

Almost surely, 2^1218885888 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 1218885888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1780144128).

1218885888 is an abundant number, since it is smaller than the sum of its proper divisors (2341402368).

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

1218885888 is a wasteful number, since it uses less digits than its factorization.

1218885888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 886 counting only the distinct ones).

The product of its digits is 2621440, while the sum is 57.

The square root of 1218885888 is about 34912.5462835354. The cubic root of 1218885888 is about 1068.2043683025.

The spelling of 1218885888 in words is "one billion, two hundred eighteen million, eight hundred eighty-five thousand, eight hundred eighty-eight".