1118729388 has 72 divisors (see below), whose sum is σ = 3045857472. Its totient is φ = 318657696.

The previous prime is 1118729383. The next prime is 1118729401. The reversal of 1118729388 is 8839278111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1118729383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201295 + ... + 206777.

It is an arithmetic number, because the mean of its divisors is an integer number (42303576).

Almost surely, 2^1118729388 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 1118729388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1522928736).

1118729388 is an abundant number, since it is smaller than the sum of its proper divisors (1927128084).

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

1118729388 is a wasteful number, since it uses less digits than its factorization.

1118729388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5851 (or 5842 counting only the distinct ones).

The product of its digits is 193536, while the sum is 48.

The square root of 1118729388 is about 33447.4122765873. The cubic root of 1118729388 is about 1038.1059547843.

The spelling of 1118729388 in words is "one billion, one hundred eighteen million, seven hundred twenty-nine thousand, three hundred eighty-eight".