1118388380 has 12 divisors (see below), whose sum is σ = 2348615640. Its totient is φ = 447355344.

The previous prime is 1118388377. The next prime is 1118388389. The reversal of 1118388380 is 838838111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118388389) 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 3 ways as a sum of consecutive naturals, for example, 27959690 + ... + 27959729.

It is an arithmetic number, because the mean of its divisors is an integer number (195717970).

Almost surely, 2^1118388380 is an apocalyptic number.

1118388380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1118388380 is an abundant number, since it is smaller than the sum of its proper divisors (1230227260).

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

1118388380 is a wasteful number, since it uses less digits than its factorization.

1118388380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55919428 (or 55919426 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 41.

The square root of 1118388380 is about 33442.3142141808. The cubic root of 1118388380 is about 1038.0004665360. Note that the first 3 decimals are identical.

The spelling of 1118388380 in words is "one billion, one hundred eighteen million, three hundred eighty-eight thousand, three hundred eighty".