1116421188 has 24 divisors (see below), whose sum is σ = 2605864800. Its totient is φ = 372014400.

The previous prime is 1116421177. The next prime is 1116421199. The reversal of 1116421188 is 8811246111.

It is an interprime number because it is at equal distance from previous prime (1116421177) and next prime (1116421199).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25488 + ... + 53688.

It is an arithmetic number, because the mean of its divisors is an integer number (108577700).

Almost surely, 2^1116421188 is an apocalyptic number.

It is an amenable number.

1116421188 is an abundant number, since it is smaller than the sum of its proper divisors (1489443612).

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

1116421188 is a wasteful number, since it uses less digits than its factorization.

1116421188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31507 (or 31505 counting only the distinct ones).

The product of its digits is 3072, while the sum is 33.

The square root of 1116421188 is about 33412.8895487954. The cubic root of 1116421188 is about 1037.3915115283.

Adding to 1116421188 its reverse (8811246111), we get a palindrome (9927667299).

The spelling of 1116421188 in words is "one billion, one hundred sixteen million, four hundred twenty-one thousand, one hundred eighty-eight".