640030271 has 8 divisors (see below), whose sum is σ = 648686400. Its totient is φ = 631388160.

The previous prime is 640030249. The next prime is 640030283. The reversal of 640030271 is 172030046.

640030271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 640030271 - 2²⁶ = 572921407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640030231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114911 + ... + 120351.

It is an arithmetic number, because the mean of its divisors is an integer number (81085800).

Almost surely, 2^640030271 is an apocalyptic number.

640030271 is a deficient number, since it is larger than the sum of its proper divisors (8656129).

640030271 is a wasteful number, since it uses less digits than its factorization.

640030271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 640030271 is about 25298.8195574418. The cubic root of 640030271 is about 861.7874626512.

The spelling of 640030271 in words is "six hundred forty million, thirty thousand, two hundred seventy-one".