636384 has 48 divisors (see below), whose sum is σ = 1911168. Its totient is φ = 181632.

The previous prime is 636359. The next prime is 636403. The reversal of 636384 is 483636.

636384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

636384 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 7 ways as a sum of consecutive naturals, for example, 199 + ... + 1145.

It is an arithmetic number, because the mean of its divisors is an integer number (39816).

2⁶³⁶³⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955584).

636384 is an abundant number, since it is smaller than the sum of its proper divisors (1274784).

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

636384 is a wasteful number, since it uses less digits than its factorization.

636384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967 (or 959 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 636384 is about 797.7367986999. The cubic root of 636384 is about 86.0147802251.

The spelling of 636384 in words is "six hundred thirty-six thousand, three hundred eighty-four".