640362 has 8 divisors (see below), whose sum is σ = 1280736. Its totient is φ = 213452.

The previous prime is 640333. The next prime is 640363. The reversal of 640362 is 263046.

640362 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.

640362 is an admirable number.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 640362.

It is not an unprimeable number, because it can be changed into a prime (640363) by changing a digit.

640362 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53358 + ... + 53369.

It is an arithmetic number, because the mean of its divisors is an integer number (160092).

2⁶⁴⁰³⁶² is an apocalyptic number.

640362 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.

640362 is a wasteful number, since it uses less digits than its factorization.

640362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106732.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 640362 is about 800.2262180159. The cubic root of 640362 is about 86.1936325671.

The spelling of 640362 in words is "six hundred forty thousand, three hundred sixty-two".