640463314 has 8 divisors (see below), whose sum is σ = 961976448. Its totient is φ = 319804500.

The previous prime is 640463311. The next prime is 640463333. The reversal of 640463314 is 413364046.

It is a happy number.

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 (640463311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211702 + ... + 214705.

It is an arithmetic number, because the mean of its divisors is an integer number (120247056).

Almost surely, 2^640463314 is an apocalyptic number.

640463314 is a deficient number, since it is larger than the sum of its proper divisors (321513134).

640463314 is a wasteful number, since it uses less digits than its factorization.

640463314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427160.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 640463314 is about 25307.3766716347. The cubic root of 640463314 is about 861.9817799671.

The spelling of 640463314 in words is "six hundred forty million, four hundred sixty-three thousand, three hundred fourteen".