1099648 has 48 divisors (see below), whose sum is σ = 2441880. Its totient is φ = 492800.

The previous prime is 1099633. The next prime is 1099649. The reversal of 1099648 is 8469901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15453 + ... + 15523.

2^1099648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220940).

1099648 is an abundant number, since it is smaller than the sum of its proper divisors (1342232).

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

1099648 is an equidigital number, since it uses as much as digits as its factorization.

1099648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1099648 is about 1048.6410253275. The cubic root of 1099648 is about 103.2169993830.

The spelling of 1099648 in words is "one million, ninety-nine thousand, six hundred forty-eight".