1108640 has 72 divisors (see below), whose sum is σ = 2905308. Its totient is φ = 399360.

The previous prime is 1108633. The next prime is 1108663. The reversal of 1108640 is 468011.

It can be written as a sum of positive squares in 6 ways, for example, as 1936 + 1106704 = 44^2 + 1052^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27020 + ... + 27060.

2^1108640 is an apocalyptic number.

1108640 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 1108640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452654).

1108640 is an abundant number, since it is smaller than the sum of its proper divisors (1796668).

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

1108640 is a wasteful number, since it uses less digits than its factorization.

1108640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1108640 is about 1052.9197500285. The cubic root of 1108640 is about 103.4975767051.

The spelling of 1108640 in words is "one million, one hundred eight thousand, six hundred forty".