8729658 has 48 divisors (see below), whose sum is σ = 21914880. Its totient is φ = 2459808.

The previous prime is 8729647. The next prime is 8729659. The reversal of 8729658 is 8569278.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8729659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9516 + ... + 10392.

It is an arithmetic number, because the mean of its divisors is an integer number (456560).

Almost surely, 2^8729658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8729658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10957440).

8729658 is an abundant number, since it is smaller than the sum of its proper divisors (13185222).

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

8729658 is a wasteful number, since it uses less digits than its factorization.

8729658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 968 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 8729658 is about 2954.5994652406. The cubic root of 8729658 is about 205.9044550165.

The spelling of 8729658 in words is "eight million, seven hundred twenty-nine thousand, six hundred fifty-eight".