640005333 has 16 divisors (see below), whose sum is σ = 931348992. Its totient is φ = 387702000.

The previous prime is 640005313. The next prime is 640005343. The reversal of 640005333 is 333500046.

640005333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640005333 - 2⁶ = 640005269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640005313) 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, 115128 + ... + 120558.

It is an arithmetic number, because the mean of its divisors is an integer number (58209312).

Almost surely, 2^640005333 is an apocalyptic number.

It is an amenable number.

640005333 is a deficient number, since it is larger than the sum of its proper divisors (291343659).

640005333 is a wasteful number, since it uses less digits than its factorization.

640005333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016.

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 640005333 is about 25298.3266837947. The cubic root of 640005333 is about 861.7762696728.

Adding to 640005333 its reverse (333500046), we get a palindrome (973505379).

The spelling of 640005333 in words is "six hundred forty million, five thousand, three hundred thirty-three".