1191270080 has 224 divisors, whose sum is σ = 3809756160. Its totient is φ = 342650880.

The previous prime is 1191270071. The next prime is 1191270083. The reversal of 1191270080 is 800721911.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (1191270083) 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 31 ways as a sum of consecutive naturals, for example, 318461 + ... + 322179.

It is an arithmetic number, because the mean of its divisors is an integer number (17007840).

Almost surely, 2^1191270080 is an apocalyptic number.

1191270080 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 1191270080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904878080).

1191270080 is an abundant number, since it is smaller than the sum of its proper divisors (2618486080).

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

1191270080 is a wasteful number, since it uses less digits than its factorization.

1191270080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767 (or 3757 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 1191270080 is about 34514.7806019392. The cubic root of 1191270080 is about 1060.0753714057.

Adding to 1191270080 its reverse (800721911), we get a palindrome (1991991991).

The spelling of 1191270080 in words is "one billion, one hundred ninety-one million, two hundred seventy thousand, eighty".