1728890473 has 4 divisors (see below), whose sum is σ = 1804059648. Its totient is φ = 1653721300.

The previous prime is 1728890413. The next prime is 1728890483. The reversal of 1728890473 is 3740988271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3740988271 = 31 ⋅120677041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1728890473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1728890413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37584553 + ... + 37584598.

It is an arithmetic number, because the mean of its divisors is an integer number (451014912).

Almost surely, 2^1728890473 is an apocalyptic number.

It is an amenable number.

1728890473 is a deficient number, since it is larger than the sum of its proper divisors (75169175).

1728890473 is an equidigital number, since it uses as much as digits as its factorization.

1728890473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75169174.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 1728890473 is about 41579.9287276926. The cubic root of 1728890473 is about 1200.2060926121.

The spelling of 1728890473 in words is "one billion, seven hundred twenty-eight million, eight hundred ninety thousand, four hundred seventy-three".