1728130145 has 16 divisors (see below), whose sum is σ = 2391755520. Its totient is φ = 1174129344.

The previous prime is 1728130141. The next prime is 1728130163. The reversal of 1728130145 is 5410318271.

It is a cyclic number.

It is not a de Polignac number, because 1728130145 - 2² = 1728130141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1728130141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222677 + ... + 230306.

It is an arithmetic number, because the mean of its divisors is an integer number (149484720).

Almost surely, 2^1728130145 is an apocalyptic number.

It is an amenable number.

1728130145 is a deficient number, since it is larger than the sum of its proper divisors (663625375).

1728130145 is a wasteful number, since it uses less digits than its factorization.

1728130145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453104.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1728130145 is about 41570.7847532375. The cubic root of 1728130145 is about 1200.0301254011.

The spelling of 1728130145 in words is "one billion, seven hundred twenty-eight million, one hundred thirty thousand, one hundred forty-five".