1109771712 has 224 divisors, whose sum is σ = 3891686400. Its totient is φ = 303215616.

The previous prime is 1109771711. The next prime is 1109771743. The reversal of 1109771712 is 2171779011.

It is a happy number.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109771711) 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, 276214 + ... + 280202.

It is an arithmetic number, because the mean of its divisors is an integer number (17373600).

Almost surely, 2^1109771712 is an apocalyptic number.

1109771712 is a gapful number since it is divisible by the number (12) 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 1109771712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1945843200).

1109771712 is an abundant number, since it is smaller than the sum of its proper divisors (2781914688).

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

1109771712 is a wasteful number, since it uses less digits than its factorization.

1109771712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 36.

The square root of 1109771712 is about 33313.2362882984. The cubic root of 1109771712 is about 1035.3278188632.

The spelling of 1109771712 in words is "one billion, one hundred nine million, seven hundred seventy-one thousand, seven hundred twelve".