8681730 has 64 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 2100224.

The previous prime is 8681707. The next prime is 8681731. The reversal of 8681730 is 371868.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8681691 and 8681700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8681731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14497 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (357210).

Almost surely, 2^8681730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8681730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11430720).

8681730 is an abundant number, since it is smaller than the sum of its proper divisors (14179710).

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

8681730 is a wasteful number, since it uses less digits than its factorization.

8681730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 8681730 is about 2946.4775580343. The cubic root of 8681730 is about 205.5269410159.

The spelling of 8681730 in words is "eight million, six hundred eighty-one thousand, seven hundred thirty".