640083586 has 8 divisors (see below), whose sum is σ = 964143360. Its totient is φ = 318702468.

The previous prime is 640083581. The next prime is 640083589. The reversal of 640083586 is 685380046.

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

It is not an unprimeable number, because it can be changed into a prime (640083581) 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, 669066 + ... + 670021.

It is an arithmetic number, because the mean of its divisors is an integer number (120517920).

Almost surely, 2^640083586 is an apocalyptic number.

640083586 is a deficient number, since it is larger than the sum of its proper divisors (324059774).

640083586 is a wasteful number, since it uses less digits than its factorization.

640083586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339328.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 640083586 is about 25299.8732407892. The cubic root of 640083586 is about 861.8113911667.

The spelling of 640083586 in words is "six hundred forty million, eighty-three thousand, five hundred eighty-six".