1728808101 has 6 divisors (see below), whose sum is σ = 2497167270. Its totient is φ = 1152538728.

The previous prime is 1728808051. The next prime is 1728808139. The reversal of 1728808101 is 1018088271.

It can be written as a sum of positive squares in only one way, i.e., 1726402500 + 2405601 = 41550^2 + 1551^2 .

It is not a de Polignac number, because 1728808101 - 2¹⁴ = 1728791717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728808141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 96044886 + ... + 96044903.

It is an arithmetic number, because the mean of its divisors is an integer number (416194545).

Almost surely, 2^1728808101 is an apocalyptic number.

It is an amenable number.

1728808101 is a deficient number, since it is larger than the sum of its proper divisors (768359169).

1728808101 is a wasteful number, since it uses less digits than its factorization.

1728808101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192089795 (or 192089792 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 36.

The square root of 1728808101 is about 41578.9381899057. The cubic root of 1728808101 is about 1200.1870312646.

The spelling of 1728808101 in words is "one billion, seven hundred twenty-eight million, eight hundred eight thousand, one hundred one".