1109475840 has 320 divisors, whose sum is σ = 4044598272. Its totient is φ = 256819200.

The previous prime is 1109475803. The next prime is 1109475841. The reversal of 1109475840 is 485749011.

It is a tau number, because it is divible by the number of its divisors (320).

It is not an unprimeable number, because it can be changed into a prime (1109475841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1942755 + ... + 1943325.

Almost surely, 2^1109475840 is an apocalyptic number.

1109475840 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 1109475840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2022299136).

1109475840 is an abundant number, since it is smaller than the sum of its proper divisors (2935122432).

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

1109475840 is a wasteful number, since it uses less digits than its factorization.

1109475840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1109475840 is about 33308.7952348925. The cubic root of 1109475840 is about 1035.2358024194.

The spelling of 1109475840 in words is "one billion, one hundred nine million, four hundred seventy-five thousand, eight hundred forty".