1118387712 has 80 divisors (see below), whose sum is σ = 3208700880. Its totient is φ = 344113152.

The previous prime is 1118387693. The next prime is 1118387717. The reversal of 1118387712 is 2177838111.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118387717) 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 7 ways as a sum of consecutive naturals, for example, 8037 + ... + 47972.

It is an arithmetic number, because the mean of its divisors is an integer number (40108761).

Almost surely, 2^1118387712 is an apocalyptic number.

1118387712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1118387712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604350440).

1118387712 is an abundant number, since it is smaller than the sum of its proper divisors (2090313168).

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

1118387712 is an equidigital number, since it uses as much as digits as its factorization.

1118387712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56043 (or 56027 counting only the distinct ones).

The product of its digits is 18816, while the sum is 39.

The square root of 1118387712 is about 33442.3042268322. The cubic root of 1118387712 is about 1038.0002598742. Note that the first 3 decimals are identical.

The spelling of 1118387712 in words is "one billion, one hundred eighteen million, three hundred eighty-seven thousand, seven hundred twelve".