1101089808 has 320 divisors, whose sum is σ = 4000299520. Its totient is φ = 282175488.

The previous prime is 1101089807. The next prime is 1101089849. The reversal of 1101089808 is 8089801011.

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

It is not an unprimeable number, because it can be changed into a prime (1101089807) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1454166 + ... + 1454922.

It is an arithmetic number, because the mean of its divisors is an integer number (12500936).

Almost surely, 2^1101089808 is an apocalyptic number.

1101089808 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 1101089808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2000149760).

1101089808 is an abundant number, since it is smaller than the sum of its proper divisors (2899209712).

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

1101089808 is a wasteful number, since it uses less digits than its factorization.

1101089808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 1101089808 is about 33182.6733100273. The cubic root of 1101089808 is about 1032.6209081264.

The spelling of 1101089808 in words is "one billion, one hundred one million, eighty-nine thousand, eight hundred eight".