1109017780 has 96 divisors (see below), whose sum is σ = 2688505344. Its totient is φ = 380626944.

The previous prime is 1109017771. The next prime is 1109017801. The reversal of 1109017780 is 877109011.

It is a super-2 number, since 2×1109017780² = 2459840872712256800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

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 31 ways as a sum of consecutive naturals, for example, 365349 + ... + 368371.

It is an arithmetic number, because the mean of its divisors is an integer number (28005264).

Almost surely, 2^1109017780 is an apocalyptic number.

1109017780 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 1109017780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1344252672).

1109017780 is an abundant number, since it is smaller than the sum of its proper divisors (1579487564).

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

1109017780 is a wasteful number, since it uses less digits than its factorization.

1109017780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145 (or 3143 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 34.

The square root of 1109017780 is about 33301.9185633501. The cubic root of 1109017780 is about 1035.0933130957.

The spelling of 1109017780 in words is "one billion, one hundred nine million, seventeen thousand, seven hundred eighty".