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544320 = 263557

544320 has 168 divisors, whose sum is σ = 2218944. Its totient is φ = 124416.

The previous prime is 544279. The next prime is 544367. The reversal of 544320 is 23445.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 544293 and 544302.

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, 77757 + ... + 77763.

It is an arithmetic number, because the mean of its divisors is an integer number (13208).

2544320 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 544320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109472).

544320 is an abundant number, since it is smaller than the sum of its proper divisors (1674624).

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

544320 is an equidigital number, since it uses as much as digits as its factorization.

544320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 544320 is about 737.7804551491. The cubic root of 544320 is about 81.6491053914.

Adding to 544320 its reverse (23445), we get a palindrome (567765).

The spelling of 544320 in words is "five hundred forty-four thousand, three hundred twenty".