1109220 has 96 divisors (see below), whose sum is σ = 3763200. Its totient is φ = 238464.

The previous prime is 1109219. The next prime is 1109231. The reversal of 1109220 is 229011.

1109220 = T₃₂₃ + T₃₂₄ + ... + T₃₄₂.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1109220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7911 + ... + 8049.

It is an arithmetic number, because the mean of its divisors is an integer number (39200).

2^1109220 is an apocalyptic number.

1109220 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 1109220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881600).

1109220 is an abundant number, since it is smaller than the sum of its proper divisors (2653980).

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

1109220 is a wasteful number, since it uses less digits than its factorization.

1109220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1109220 is about 1053.1951386139. The cubic root of 1109220 is about 103.5156222772.

The spelling of 1109220 in words is "one million, one hundred nine thousand, two hundred twenty".