640057006 has 8 divisors (see below), whose sum is σ = 986033880. Its totient is φ = 311379048.

The previous prime is 640057003. The next prime is 640057007. The reversal of 640057006 is 600750046.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640057003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4324636 + ... + 4324783.

It is an arithmetic number, because the mean of its divisors is an integer number (123254235).

Almost surely, 2^640057006 is an apocalyptic number.

640057006 is a deficient number, since it is larger than the sum of its proper divisors (345976874).

640057006 is a wasteful number, since it uses less digits than its factorization.

640057006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8649458.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 640057006 is about 25299.3479362611. The cubic root of 640057006 is about 861.7994618581.

The spelling of 640057006 in words is "six hundred forty million, fifty-seven thousand, six".