640096 has 24 divisors (see below), whose sum is σ = 1280664. Its totient is φ = 314880.

The previous prime is 640069. The next prime is 640099. The reversal of 640096 is 690046.

640096 is a modest number, since divided by 96 gives 64 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 640096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2536 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (53361).

2⁶⁴⁰⁰⁹⁶ is an apocalyptic number.

It is an amenable number.

640096 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

640096 is a wasteful number, since it uses less digits than its factorization.

640096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 640096 is about 800.0599977502. The cubic root of 640096 is about 86.1816962552.

The spelling of 640096 in words is "six hundred forty thousand, ninety-six".