490644 has 96 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 125280.

The previous prime is 490643. The next prime is 490661. The reversal of 490644 is 446094.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490643) 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 31 ways as a sum of consecutive naturals, for example, 8287 + ... + 8345.

It is an arithmetic number, because the mean of its divisors is an integer number (16800).

2⁴⁹⁰⁶⁴⁴ is an apocalyptic number.

490644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 490644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (806400).

490644 is an abundant number, since it is smaller than the sum of its proper divisors (1122156).

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

490644 is a wasteful number, since it uses less digits than its factorization.

490644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 490644 is about 700.4598489564. The cubic root of 490644 is about 78.8718747794.

It can be divided in two parts, 4906 and 44, that added together give a triangular number (4950 = T₉₉).

The spelling of 490644 in words is "four hundred ninety thousand, six hundred forty-four".