8628689 has 8 divisors (see below), whose sum is σ = 8971560. Its totient is φ = 8288896.

The previous prime is 8628677. The next prime is 8628709. The reversal of 8628689 is 9868268.

It can be written as a sum of positive squares in 4 ways, for example, as 883600 + 7745089 = 940^2 + 2783^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-8628689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8628629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6119 + ... + 7395.

It is an arithmetic number, because the mean of its divisors is an integer number (1121445).

Almost surely, 2^8628689 is an apocalyptic number.

It is an amenable number.

8628689 is a deficient number, since it is larger than the sum of its proper divisors (342871).

8628689 is a wasteful number, since it uses less digits than its factorization.

8628689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539.

The product of its digits is 331776, while the sum is 47.

The square root of 8628689 is about 2937.4630210438. The cubic root of 8628689 is about 205.1075303403.

The spelling of 8628689 in words is "eight million, six hundred twenty-eight thousand, six hundred eighty-nine".