1728243555 has 8 divisors (see below), whose sum is σ = 2765189712. Its totient is φ = 921729888.

The previous prime is 1728243551. The next prime is 1728243571. The reversal of 1728243555 is 5553428271.

1728243555 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1728243555 - 2² = 1728243551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1728243551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57608104 + ... + 57608133.

It is an arithmetic number, because the mean of its divisors is an integer number (345648714).

Almost surely, 2^1728243555 is an apocalyptic number.

1728243555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1728243555 is a deficient number, since it is larger than the sum of its proper divisors (1036946157).

1728243555 is a wasteful number, since it uses less digits than its factorization.

1728243555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115216245.

The product of its digits is 336000, while the sum is 42.

The square root of 1728243555 is about 41572.1487897847. The cubic root of 1728243555 is about 1200.0563758237.

The spelling of 1728243555 in words is "one billion, seven hundred twenty-eight million, two hundred forty-three thousand, five hundred fifty-five".