640603360 has 48 divisors (see below), whose sum is σ = 1579235616. Its totient is φ = 245099008.

The previous prime is 640603343. The next prime is 640603361. The reversal of 640603360 is 63306046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640603361) 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, 83359 + ... + 90718.

It is an arithmetic number, because the mean of its divisors is an integer number (32900742).

Almost surely, 2^640603360 is an apocalyptic number.

It is an amenable number.

640603360 is an abundant number, since it is smaller than the sum of its proper divisors (938632256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640603360 is a wasteful number, since it uses less digits than its factorization.

640603360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174115 (or 174107 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 640603360 is about 25310.1434211661. The cubic root of 640603360 is about 862.0446033950.

The spelling of 640603360 in words is "six hundred forty million, six hundred three thousand, three hundred sixty".