1118238720 has 192 divisors, whose sum is σ = 3626532000. Its totient is φ = 294125568.

The previous prime is 1118238713. The next prime is 1118238721. The reversal of 1118238720 is 278328111.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118238721) 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 15 ways as a sum of consecutive naturals, for example, 2733876 + ... + 2734284.

Almost surely, 2^1118238720 is an apocalyptic number.

1118238720 is a gapful number since it is divisible by the number (10) 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 1118238720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813266000).

1118238720 is an abundant number, since it is smaller than the sum of its proper divisors (2508293280).

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

1118238720 is an equidigital number, since it uses as much as digits as its factorization.

1118238720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 1118238720 is about 33440.0765549363. The cubic root of 1118238720 is about 1037.9541635753.

The spelling of 1118238720 in words is "one billion, one hundred eighteen million, two hundred thirty-eight thousand, seven hundred twenty".