1109790720 has 312 divisors, whose sum is σ = 4007168256. Its totient is φ = 294617088.

The previous prime is 1109790709. The next prime is 1109790739. The reversal of 1109790720 is 270979011.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4976529 + ... + 4976751.

It is an arithmetic number, because the mean of its divisors is an integer number (12843488).

Almost surely, 2^1109790720 is an apocalyptic number.

1109790720 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 1109790720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2003584128).

1109790720 is an abundant number, since it is smaller than the sum of its proper divisors (2897377536).

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

1109790720 is an frugal number, since it uses more digits than its factorization.

1109790720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 1109790720 is about 33313.5215790826. The cubic root of 1109790720 is about 1035.3337298083. Note that the first 3 decimals are identical.

The spelling of 1109790720 in words is "one billion, one hundred nine million, seven hundred ninety thousand, seven hundred twenty".