8729281 has 8 divisors (see below), whose sum is σ = 9570528. Its totient is φ = 7896000.

The previous prime is 8729249. The next prime is 8729291. The reversal of 8729281 is 1829278.

8729281 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is not a de Polignac number, because 8729281 - 2⁵ = 8729249 is a prime.

It is a super-2 number, since 2×8729281² = 152400693553922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8729281.

It is not an unprimeable number, because it can be changed into a prime (8729221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441 + ... + 4201.

It is an arithmetic number, because the mean of its divisors is an integer number (1196316).

Almost surely, 2^8729281 is an apocalyptic number.

It is an amenable number.

8729281 is a deficient number, since it is larger than the sum of its proper divisors (841247).

8729281 is a wasteful number, since it uses less digits than its factorization.

8729281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983.

The product of its digits is 16128, while the sum is 37.

The square root of 8729281 is about 2954.5356657180. The cubic root of 8729281 is about 205.9014909028.

It can be divided in two parts, 872 and 9281, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 8729281 in words is "eight million, seven hundred twenty-nine thousand, two hundred eighty-one".