8432728168 has 8 divisors (see below), whose sum is σ = 15811365330. Its totient is φ = 4216364080.

The previous prime is 8432728163. The next prime is 8432728207. The reversal of 8432728168 is 8618272348.

It can be written as a sum of positive squares in only one way, i.e., 8375544324 + 57183844 = 91518^2 + 7562^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×8432728168² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8432728163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527045503 + ... + 527045518.

Almost surely, 2^8432728168 is an apocalyptic number.

It is an amenable number.

8432728168 is a deficient number, since it is larger than the sum of its proper divisors (7378637162).

8432728168 is a wasteful number, since it uses less digits than its factorization.

8432728168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054091027 (or 1054091023 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 8432728168 is about 91829.8871174303. The cubic root of 8432728168 is about 2035.4293550411.

The spelling of 8432728168 in words is "eight billion, four hundred thirty-two million, seven hundred twenty-eight thousand, one hundred sixty-eight".