8664740 has 48 divisors (see below), whose sum is σ = 21168000. Its totient is φ = 2917632.

The previous prime is 8664739. The next prime is 8664743. The reversal of 8664740 is 474668.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 8664740.

It is not an unprimeable number, because it can be changed into a prime (8664743) 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, 7736 + ... + 8784.

It is an arithmetic number, because the mean of its divisors is an integer number (441000).

Almost surely, 2^8664740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8664740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10584000).

8664740 is an abundant number, since it is smaller than the sum of its proper divisors (12503260).

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

8664740 is a wasteful number, since it uses less digits than its factorization.

8664740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 8664740 is about 2943.5930425247. The cubic root of 8664740 is about 205.3927825370.

The spelling of 8664740 in words is "eight million, six hundred sixty-four thousand, seven hundred forty".