1109898240 has 176 divisors, whose sum is σ = 3873251520. Its totient is φ = 269025280.

The previous prime is 1109898221. The next prime is 1109898247. The reversal of 1109898240 is 428989011.

It is a tau number, because it is divible by the number of its divisors (176).

It is a junction number, because it is equal to n+sod(n) for n = 1109898192 and 1109898201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109898247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165676 + ... + 172244.

Almost surely, 2^1109898240 is an apocalyptic number.

1109898240 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 1109898240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1936625760).

1109898240 is an abundant number, since it is smaller than the sum of its proper divisors (2763353280).

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

1109898240 is a wasteful number, since it uses less digits than its factorization.

1109898240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608 (or 6590 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 1109898240 is about 33315.1352991399. The cubic root of 1109898240 is about 1035.3671641864.

The spelling of 1109898240 in words is "one billion, one hundred nine million, eight hundred ninety-eight thousand, two hundred forty".