8640734 has 8 divisors (see below), whose sum is σ = 12998880. Its totient is φ = 4307776.

The previous prime is 8640733. The next prime is 8640739. The reversal of 8640734 is 4370468.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8640734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5414 + ... + 6825.

It is an arithmetic number, because the mean of its divisors is an integer number (1624860).

Almost surely, 2^8640734 is an apocalyptic number.

8640734 is a deficient number, since it is larger than the sum of its proper divisors (4358146).

8640734 is a wasteful number, since it uses less digits than its factorization.

8640734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12594.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 8640734 is about 2939.5125446237. The cubic root of 8640734 is about 205.2029241883.

The spelling of 8640734 in words is "eight million, six hundred forty thousand, seven hundred thirty-four".