1091338080 has 192 divisors, whose sum is σ = 3943779840. Its totient is φ = 248500224.

The previous prime is 1091338049. The next prime is 1091338081. The reversal of 1091338080 is 808331901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091338081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1273012 + ... + 1273868.

It is an arithmetic number, because the mean of its divisors is an integer number (20540520).

Almost surely, 2^1091338080 is an apocalyptic number.

1091338080 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 1091338080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971889920).

1091338080 is an abundant number, since it is smaller than the sum of its proper divisors (2852441760).

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

1091338080 is a wasteful number, since it uses less digits than its factorization.

1091338080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1091338080 is about 33035.4064603419. The cubic root of 1091338080 is about 1029.5634182040.

Adding to 1091338080 its reverse (808331901), we get a palindrome (1899669981).

The spelling of 1091338080 in words is "one billion, ninety-one million, three hundred thirty-eight thousand, eighty".