463644 has 48 divisors (see below), whose sum is σ = 1239840. Its totient is φ = 151632.

The previous prime is 463643. The next prime is 463649. The reversal of 463644 is 446364.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (463643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8722 + ... + 8774.

It is an arithmetic number, because the mean of its divisors is an integer number (25830).

2⁴⁶³⁶⁴⁴ 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 463644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619920).

463644 is an abundant number, since it is smaller than the sum of its proper divisors (776196).

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

463644 is an equidigital number, since it uses as much as digits as its factorization.

463644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 58 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 463644 is about 680.9140914976. The cubic root of 463644 is about 77.3977284352.

The spelling of 463644 in words is "four hundred sixty-three thousand, six hundred forty-four".