654444 has 72 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 183456.

The previous prime is 654439. The next prime is 654491. The reversal of 654444 is 444456.

654444 is a `hidden beast` number, since 654 + 4 + 4 + 4 = 666.

It is a nialpdrome in base 10.

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12322 + ... + 12374.

It is an arithmetic number, because the mean of its divisors is an integer number (27300).

2⁶⁵⁴⁴⁴⁴ 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 654444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982800).

654444 is an abundant number, since it is smaller than the sum of its proper divisors (1311156).

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

654444 is a wasteful number, since it uses less digits than its factorization.

654444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 65 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 654444 is about 808.9771319388. The cubic root of 654444 is about 86.8208760055.

The spelling of 654444 in words is "six hundred fifty-four thousand, four hundred forty-four".