544321728 has 224 divisors, whose sum is σ = 1719072000. Its totient is φ = 168376320.

The previous prime is 544321697. The next prime is 544321751. The reversal of 544321728 is 827123445.

It is a happy number.

544321728 is a `hidden beast` number, since 54 + 432 + 172 + 8 = 666.

It is a super-2 number, since 2×544321728² = 592572287145811968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 544321692 and 544321701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1936948 + ... + 1937228.

Almost surely, 2^544321728 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 544321728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859536000).

544321728 is an abundant number, since it is smaller than the sum of its proper divisors (1174750272).

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

544321728 is a wasteful number, since it uses less digits than its factorization.

544321728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 364 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 544321728 is about 23330.7035470429. The cubic root of 544321728 is about 816.4919179252.

The spelling of 544321728 in words is "five hundred forty-four million, three hundred twenty-one thousand, seven hundred twenty-eight".