1099808 has 12 divisors (see below), whose sum is σ = 2165310. Its totient is φ = 549888.

The previous prime is 1099807. The next prime is 1099817. The reversal of 1099808 is 8089901.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 478864 = 788^2 + 692^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1099807) by changing a digit.

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 as a sum of consecutive naturals, namely, 17153 + ... + 17216.

2^1099808 is an apocalyptic number.

It is an amenable number.

1099808 is a deficient number, since it is larger than the sum of its proper divisors (1065502).

1099808 is an equidigital number, since it uses as much as digits as its factorization.

1099808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34379 (or 34371 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1099808 is about 1048.7173117671. The cubic root of 1099808 is about 103.2220052028. Note that the first 3 decimals are identical.

The spelling of 1099808 in words is "one million, ninety-nine thousand, eight hundred eight".