1728397476 has 135 divisors (see below), whose sum is σ = 4851332213. Its totient is φ = 518843520.

The previous prime is 1728397393. The next prime is 1728397487. The reversal of 1728397476 is 6747938271.

The square root of 1728397476 is 41574.

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

1728397476 is a `hidden beast` number, since 1 + 7 + 2 + 83 + 97 + 476 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 1240871076 + 487526400 = 35226^2 + 22080^2 .

Its product of digits (3556224) is a multiple of the sum of its prime factors (144).

It is an unprimeable number.

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 44 ways as a sum of consecutive naturals, for example, 42156016 + ... + 42156056.

Almost surely, 2^1728397476 is an apocalyptic number.

1728397476 is the 41574-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1728397476

1728397476 is an abundant number, since it is smaller than the sum of its proper divisors (3122934737).

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

1728397476 is an equidigital number, since it uses as much as digits as its factorization.

1728397476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 59 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The cubic root of 1728397476 is about 1200.0920012796.

The spelling of 1728397476 in words is "one billion, seven hundred twenty-eight million, three hundred ninety-seven thousand, four hundred seventy-six".