636441 has 8 divisors (see below), whose sum is σ = 913920. Its totient is φ = 391632.

The previous prime is 636421. The next prime is 636469. The reversal of 636441 is 144636.

636441 is digitally balanced in base 2 and base 7, because in such bases 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.

It is not a de Polignac number, because 636441 - 2⁵ = 636409 is a prime.

636441 is strictly pandigital in base 7.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8121 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (114240).

2⁶³⁶⁴⁴¹ is an apocalyptic number.

It is an amenable number.

636441 is a deficient number, since it is larger than the sum of its proper divisors (277479).

636441 is a wasteful number, since it uses less digits than its factorization.

636441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16335.

The product of its digits is 1728, while the sum is 24.

The square root of 636441 is about 797.7725239691. The cubic root of 636441 is about 86.0173482219.

The spelling of 636441 in words is "six hundred thirty-six thousand, four hundred forty-one".