1091133880 has 32 divisors (see below), whose sum is σ = 2468782800. Its totient is φ = 434012416.

The previous prime is 1091133851. The next prime is 1091133937. The reversal of 1091133880 is 883311901.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 69037 + ... + 83356.

Almost surely, 2^1091133880 is an apocalyptic number.

1091133880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091133880 is an abundant number, since it is smaller than the sum of its proper divisors (1377648920).

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

1091133880 is a wasteful number, since it uses less digits than its factorization.

1091133880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152583 (or 152579 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1091133880 is about 33032.3156923640. The cubic root of 1091133880 is about 1029.4992004125.

The spelling of 1091133880 in words is "one billion, ninety-one million, one hundred thirty-three thousand, eight hundred eighty".