636022 has 8 divisors (see below), whose sum is σ = 957456. Its totient is φ = 316872.

The previous prime is 636017. The next prime is 636023. The reversal of 636022 is 220636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648 + ... + 1300.

It is an arithmetic number, because the mean of its divisors is an integer number (119682).

2⁶³⁶⁰²² is an apocalyptic number.

636022 is a deficient number, since it is larger than the sum of its proper divisors (321434).

636022 is a wasteful number, since it uses less digits than its factorization.

636022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 636022 is about 797.5098745470. The cubic root of 636022 is about 85.9984676129.

Adding to 636022 its reverse (220636), we get a palindrome (856658).

The spelling of 636022 in words is "six hundred thirty-six thousand, twenty-two".