1109798172 has 60 divisors (see below), whose sum is σ = 3315700080. Its totient is φ = 317084544.

The previous prime is 1109798167. The next prime is 1109798197. The reversal of 1109798172 is 2718979011.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 242397 + ... + 246932.

It is an arithmetic number, because the mean of its divisors is an integer number (55261668).

Almost surely, 2^1109798172 is an apocalyptic number.

1109798172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1109798172 is an abundant number, since it is smaller than the sum of its proper divisors (2205901908).

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

1109798172 is a wasteful number, since it uses less digits than its factorization.

1109798172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489352 (or 489341 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

The square root of 1109798172 is about 33313.6334253711. The cubic root of 1109798172 is about 1035.3360471490.

The spelling of 1109798172 in words is "one billion, one hundred nine million, seven hundred ninety-eight thousand, one hundred seventy-two".