1728434845 has 16 divisors (see below), whose sum is σ = 2215880640. Its totient is φ = 1290415104.

The previous prime is 1728434839. The next prime is 1728434891. The reversal of 1728434845 is 5484348271.

It is a cyclic number.

It is not a de Polignac number, because 1728434845 - 2¹⁹ = 1727910557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1728434795 and 1728434804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129412 + ... + 142141.

It is an arithmetic number, because the mean of its divisors is an integer number (138492540).

Almost surely, 2^1728434845 is an apocalyptic number.

It is an amenable number.

1728434845 is a deficient number, since it is larger than the sum of its proper divisors (487445795).

1728434845 is a wasteful number, since it uses less digits than its factorization.

1728434845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271644.

The product of its digits is 860160, while the sum is 46.

The square root of 1728434845 is about 41574.4494250976. The cubic root of 1728434845 is about 1200.1006501225.

The spelling of 1728434845 in words is "one billion, seven hundred twenty-eight million, four hundred thirty-four thousand, eight hundred forty-five".