1728921552 has 40 divisors (see below), whose sum is σ = 4488849600. Its totient is φ = 573408000.

The previous prime is 1728921529. The next prime is 1728921611. The reversal of 1728921552 is 2551298271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80949 + ... + 100052.

It is an arithmetic number, because the mean of its divisors is an integer number (112221240).

Almost surely, 2^1728921552 is an apocalyptic number.

1728921552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1728921552 is an abundant number, since it is smaller than the sum of its proper divisors (2759928048).

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

1728921552 is a wasteful number, since it uses less digits than its factorization.

1728921552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181211 (or 181205 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The square root of 1728921552 is about 41580.3024520024. The cubic root of 1728921552 is about 1200.2132843115.

The spelling of 1728921552 in words is "one billion, seven hundred twenty-eight million, nine hundred twenty-one thousand, five hundred fifty-two".