1099388811 has 32 divisors (see below), whose sum is σ = 1608710400. Its totient is φ = 665159040.

The previous prime is 1099388789. The next prime is 1099388813. The reversal of 1099388811 is 1188839901.

It is not a de Polignac number, because 1099388811 - 2⁶ = 1099388747 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1099388813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214005 + ... + 219081.

It is an arithmetic number, because the mean of its divisors is an integer number (50272200).

Almost surely, 2^1099388811 is an apocalyptic number.

1099388811 is a deficient number, since it is larger than the sum of its proper divisors (509321589).

1099388811 is a wasteful number, since it uses less digits than its factorization.

1099388811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5259.

The product of its (nonzero) digits is 124416, while the sum is 48.

The square root of 1099388811 is about 33157.0326024510. The cubic root of 1099388811 is about 1032.0888926869.

The spelling of 1099388811 in words is "one billion, ninety-nine million, three hundred eighty-eight thousand, eight hundred eleven".