640034353 has 8 divisors (see below), whose sum is σ = 731935872. Its totient is φ = 548249856.

The previous prime is 640034341. The next prime is 640034357. The reversal of 640034353 is 353430046.

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

It is a de Polignac number, because none of the positive numbers 2^k-640034353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640034357) 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, 17200 + ... + 39697.

It is an arithmetic number, because the mean of its divisors is an integer number (91491984).

Almost surely, 2^640034353 is an apocalyptic number.

It is an amenable number.

640034353 is a deficient number, since it is larger than the sum of its proper divisors (91901519).

640034353 is a wasteful number, since it uses less digits than its factorization.

640034353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58511.

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 640034353 is about 25298.9002330141. The cubic root of 640034353 is about 861.7892947567.

Adding to 640034353 its reverse (353430046), we get a palindrome (993464399).

The spelling of 640034353 in words is "six hundred forty million, thirty-four thousand, three hundred fifty-three".