1191481488 has 180 divisors, whose sum is σ = 3668879760. Its totient is φ = 373294656.

The previous prime is 1191481481. The next prime is 1191481523. The reversal of 1191481488 is 8841841911.

1191481488 is a `hidden beast` number, since 1 + 1 + 91 + 4 + 81 + 488 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1191481481) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9381681 + ... + 9381807.

Almost surely, 2^1191481488 is an apocalyptic number.

1191481488 is a gapful number since it is divisible by the number (18) 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 1191481488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834439880).

1191481488 is an abundant number, since it is smaller than the sum of its proper divisors (2477398272).

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

1191481488 is an equidigital number, since it uses as much as digits as its factorization.

1191481488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 151 counting only the distinct ones).

The product of its digits is 73728, while the sum is 45.

The square root of 1191481488 is about 34517.8430380579. The cubic root of 1191481488 is about 1060.1380762343.

The spelling of 1191481488 in words is "one billion, one hundred ninety-one million, four hundred eighty-one thousand, four hundred eighty-eight".