1099008 has 90 divisors (see below), whose sum is σ = 3338874. Its totient is φ = 359424.

The previous prime is 1098989. The next prime is 1099031. The reversal of 1099008 is 8009901.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 82944 = 1008^2 + 288^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20710 + ... + 20762.

2^1099008 is an apocalyptic number.

1099008 is a gapful number since it is divisible by the number (18) 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 1099008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669437).

1099008 is an abundant number, since it is smaller than the sum of its proper divisors (2239866).

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

1099008 is an frugal number, since it uses more digits than its factorization.

1099008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1099008 is about 1048.3358240564. The cubic root of 1099008 is about 103.1969712470.

1099008 divided by its sum of digits (27) gives a palindrome (40704).

The spelling of 1099008 in words is "one million, ninety-nine thousand, eight".