1099986816 has 64 divisors (see below), whose sum is σ = 2927232720. Its totient is φ = 365985792.

The previous prime is 1099986793. The next prime is 1099986821. The reversal of 1099986816 is 6186899901.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233056 + ... + 237728.

Almost surely, 2^1099986816 is an apocalyptic number.

1099986816 is a gapful number since it is divisible by the number (16) 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 1099986816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463616360).

1099986816 is an abundant number, since it is smaller than the sum of its proper divisors (1827245904).

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

1099986816 is an equidigital number, since it uses as much as digits as its factorization.

1099986816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303 (or 5291 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 57.

The square root of 1099986816 is about 33166.0491466801. The cubic root of 1099986816 is about 1032.2759913244.

The spelling of 1099986816 in words is "one billion, ninety-nine million, nine hundred eighty-six thousand, eight hundred sixteen".