1051728189444 has 81 divisors (see below), whose sum is σ = 2705292616117. Its totient is φ = 344515133568.

The previous prime is 1051728189431. The next prime is 1051728189451. The reversal of 1051728189444 is 4449818271501.

It is a happy number.

The square root of 1051728189444 is 1025538.

It is a perfect power (a square), and thus also a powerful number.

1051728189444 is a `hidden beast` number, since 1 + 0 + 5 + 17 + 2 + 8 + 189 + 444 = 666.

1051728189444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 119128522500 + 932599666944 = 345150^2 + 965712^2 .

It is a super-2 number, since 2×1051728189444² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 363039004 + ... + 363041900.

Almost surely, 2^{1051728189444} is an apocalyptic number.

1051728189444 is the 1025538-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1051728189444

1051728189444 is an abundant number, since it is smaller than the sum of its proper divisors (1653564426673).

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

1051728189444 is an frugal number, since it uses more digits than its factorization.

1051728189444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922 (or 2961 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 1051728189444 in words is "one trillion, fifty-one billion, seven hundred twenty-eight million, one hundred eighty-nine thousand, four hundred forty-four".