1188211680 has 336 divisors, whose sum is σ = 4303412064. Its totient is φ = 309795840.

The previous prime is 1188211589. The next prime is 1188211681. The reversal of 1188211680 is 861128811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188211681) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 7114957 + ... + 7115123.

It is an arithmetic number, because the mean of its divisors is an integer number (12807774).

Almost surely, 2^1188211680 is an apocalyptic number.

1188211680 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 1188211680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151706032).

1188211680 is an abundant number, since it is smaller than the sum of its proper divisors (3115200384).

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

1188211680 is an equidigital number, since it uses as much as digits as its factorization.

1188211680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 36.

The square root of 1188211680 is about 34470.4464723044. The cubic root of 1188211680 is about 1059.1674012506.

The spelling of 1188211680 in words is "one billion, one hundred eighty-eight million, two hundred eleven thousand, six hundred eighty".