382640 has 20 divisors (see below), whose sum is σ = 889824. Its totient is φ = 153024.

The previous prime is 382631. The next prime is 382643. The reversal of 382640 is 46283.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 382640.

It is not an unprimeable number, because it can be changed into a prime (382643) by changing a digit.

382640 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, 2312 + ... + 2471.

2³⁸²⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

382640 is an abundant number, since it is smaller than the sum of its proper divisors (507184).

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

382640 is a wasteful number, since it uses less digits than its factorization.

382640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796 (or 4790 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 382640 is about 618.5790167796. The cubic root of 382640 is about 72.5989137394.

The spelling of 382640 in words is "three hundred eighty-two thousand, six hundred forty".