999456768 has 96 divisors (see below), whose sum is σ = 2888127450. Its totient is φ = 333053952.

The previous prime is 999456767. The next prime is 999456781. The reversal of 999456768 is 867654999.

It is a happy number.

999456768 is a `hidden beast` number, since 9 + 9 + 9 + 4 + 567 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 585252864 + 414203904 = 24192^2 + 20352^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×999456768² = 1997827662202011648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (999456763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293218 + ... + 296606.

Almost surely, 2^999456768 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 999456768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444063725).

999456768 is an abundant number, since it is smaller than the sum of its proper divisors (1888670682).

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

999456768 is an equidigital number, since it uses as much as digits as its factorization.

999456768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425 (or 3394 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The square root of 999456768 is about 31614.1861827883. The cubic root of 999456768 is about 999.8188898678.

The spelling of 999456768 in words is "nine hundred ninety-nine million, four hundred fifty-six thousand, seven hundred sixty-eight".