1730729 has 36 divisors (see below), whose sum is σ = 2503440. Its totient is φ = 1179360.

The previous prime is 1730723. The next prime is 1730741. The reversal of 1730729 is 9270371.

It is a happy number.

It is not a de Polignac number, because 1730729 - 2⁴ = 1730713 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1730723) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 91082 + ... + 91100.

It is an arithmetic number, because the mean of its divisors is an integer number (69540).

2^1730729 is an apocalyptic number.

1730729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1730729 is a deficient number, since it is larger than the sum of its proper divisors (772711).

1730729 is a wasteful number, since it uses less digits than its factorization.

1730729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 1730729 is about 1315.5717388269. The cubic root of 1730729 is about 120.0631380703.

The spelling of 1730729 in words is "one million, seven hundred thirty thousand, seven hundred twenty-nine".