1118521180 has 24 divisors (see below), whose sum is σ = 2684451168. Its totient is φ = 383492928.

The previous prime is 1118521177. The next prime is 1118521189. The reversal of 1118521180 is 811258111.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118521189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3994579 + ... + 3994858.

It is an arithmetic number, because the mean of its divisors is an integer number (111852132).

Almost surely, 2^1118521180 is an apocalyptic number.

1118521180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1118521180 is an abundant number, since it is smaller than the sum of its proper divisors (1565929988).

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

1118521180 is a wasteful number, since it uses less digits than its factorization.

1118521180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989453 (or 7989451 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 28.

The square root of 1118521180 is about 33444.2996637693. The cubic root of 1118521180 is about 1038.0415497616.

Adding to 1118521180 its reverse (811258111), we get a palindrome (1929779291).

The spelling of 1118521180 in words is "one billion, one hundred eighteen million, five hundred twenty-one thousand, one hundred eighty".