8729288642 has 8 divisors (see below), whose sum is σ = 13138623036. Its totient is φ = 4349747632.

The previous prime is 8729288641. The next prime is 8729288683. The reversal of 8729288642 is 2468829278.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8284458361 + 444830281 = 91019^2 + 21091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8729288641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7447613 + ... + 7448784.

Almost surely, 2^8729288642 is an apocalyptic number.

8729288642 is a deficient number, since it is larger than the sum of its proper divisors (4409334394).

8729288642 is a wasteful number, since it uses less digits than its factorization.

8729288642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14896692.

The product of its digits is 6193152, while the sum is 56.

The square root of 8729288642 is about 93430.6622153563. The cubic root of 8729288642 is about 2059.0155098792.

The spelling of 8729288642 in words is "eight billion, seven hundred twenty-nine million, two hundred eighty-eight thousand, six hundred forty-two".