1118387328 has 128 divisors (see below), whose sum is σ = 3125606400. Its totient is φ = 353633280.

The previous prime is 1118387323. The next prime is 1118387339. The reversal of 1118387328 is 8237838111.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1118387328.

It is not an unprimeable number, because it can be changed into a prime (1118387323) 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, 1227193 + ... + 1228103.

It is an arithmetic number, because the mean of its divisors is an integer number (24418800).

Almost surely, 2^1118387328 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 1118387328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562803200).

1118387328 is an abundant number, since it is smaller than the sum of its proper divisors (2007219072).

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

1118387328 is a wasteful number, since it uses less digits than its factorization.

1118387328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1078 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 1118387328 is about 33442.2984856005. The cubic root of 1118387328 is about 1038.0001410746. Note that the first 3 decimals are identical.

The spelling of 1118387328 in words is "one billion, one hundred eighteen million, three hundred eighty-seven thousand, three hundred twenty-eight".