1109145408 has 112 divisors (see below), whose sum is σ = 3361236864. Its totient is φ = 316200960.

The previous prime is 1109145379. The next prime is 1109145449. The reversal of 1109145408 is 8045419011.

It is a tau number, because it is divible by the number of its divisors (112).

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 15 ways as a sum of consecutive naturals, for example, 1178218 + ... + 1179158.

Almost surely, 2^1109145408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1109145408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1680618432).

1109145408 is an abundant number, since it is smaller than the sum of its proper divisors (2252091456).

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

1109145408 is an equidigital number, since it uses as much as digits as its factorization.

1109145408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1109145408 is about 33303.8347341564. The cubic root of 1109145408 is about 1035.1330184471.

The spelling of 1109145408 in words is "one billion, one hundred nine million, one hundred forty-five thousand, four hundred eight".