1099665424 has 90 divisors (see below), whose sum is σ = 2536659258. Its totient is φ = 461260800.

The previous prime is 1099665409. The next prime is 1099665461. The reversal of 1099665424 is 4245669901.

It can be written as a sum of positive squares in 3 ways, for example, as 19360000 + 1080305424 = 4400^2 + 32868^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 325504 + ... + 328864.

Almost surely, 2^1099665424 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 1099665424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1268329629).

1099665424 is an abundant number, since it is smaller than the sum of its proper divisors (1436993834).

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

1099665424 is a wasteful number, since it uses less digits than its factorization.

1099665424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417 (or 3387 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 1099665424 is about 33161.2035969746. The cubic root of 1099665424 is about 1032.1754454035.

The spelling of 1099665424 in words is "one billion, ninety-nine million, six hundred sixty-five thousand, four hundred twenty-four".