1728861087 has 8 divisors (see below), whose sum is σ = 2440745136. Its totient is φ = 1084775552.

The previous prime is 1728861083. The next prime is 1728861089. The reversal of 1728861087 is 7801688271.

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

It is a cyclic number.

It is not a de Polignac number, because 1728861087 - 2² = 1728861083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728861083) by changing a digit.

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, 16949568 + ... + 16949669.

It is an arithmetic number, because the mean of its divisors is an integer number (305093142).

Almost surely, 2^1728861087 is an apocalyptic number.

1728861087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1728861087 is a deficient number, since it is larger than the sum of its proper divisors (711884049).

1728861087 is a wasteful number, since it uses less digits than its factorization.

1728861087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33899257.

The product of its (nonzero) digits is 301056, while the sum is 48.

The square root of 1728861087 is about 41579.5753585820. The cubic root of 1728861087 is about 1200.1992925947.

The spelling of 1728861087 in words is "one billion, seven hundred twenty-eight million, eight hundred sixty-one thousand, eighty-seven".