8729229 has 16 divisors (see below), whose sum is σ = 11936448. Its totient is φ = 5672832.

The previous prime is 8729221. The next prime is 8729239. The reversal of 8729229 is 9229278.

It is not a de Polignac number, because 8729229 - 2³ = 8729221 is a prime.

It is a d-powerful number, because it can be written as 8⁵ + 7⁶ + 2 + 9² + 2¹⁷ + 2²³ + 9⁵ .

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 27379 + ... + 27695.

It is an arithmetic number, because the mean of its divisors is an integer number (746028).

Almost surely, 2^8729229 is an apocalyptic number.

It is an amenable number.

8729229 is a deficient number, since it is larger than the sum of its proper divisors (3207219).

8729229 is a wasteful number, since it uses less digits than its factorization.

8729229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524.

The product of its digits is 36288, while the sum is 39.

The square root of 8729229 is about 2954.5268656758. The cubic root of 8729229 is about 205.9010820529.

It can be divided in two parts, 872 and 9229, that added together give a palindrome (10101).

The spelling of 8729229 in words is "eight million, seven hundred twenty-nine thousand, two hundred twenty-nine".