1099731568 has 160 divisors (see below), whose sum is σ = 2515838976. Its totient is φ = 461666304.

The previous prime is 1099731559. The next prime is 1099731599. The reversal of 1099731568 is 8651379901.

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 31 ways as a sum of consecutive naturals, for example, 15064780 + ... + 15064852.

Almost surely, 2^1099731568 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 1099731568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257919488).

1099731568 is an abundant number, since it is smaller than the sum of its proper divisors (1416107408).

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

1099731568 is a wasteful number, since it uses less digits than its factorization.

1099731568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 1099731568 is about 33162.2008919794. The cubic root of 1099731568 is about 1032.1961398325.

The spelling of 1099731568 in words is "one billion, ninety-nine million, seven hundred thirty-one thousand, five hundred sixty-eight".