729770 has 8 divisors (see below), whose sum is σ = 1313604. Its totient is φ = 291904.

The previous prime is 729761. The next prime is 729779. The reversal of 729770 is 77927.

It is an interprime number because it is at equal distance from previous prime (729761) and next prime (729779).

It can be written as a sum of positive squares in 2 ways, for example, as 677329 + 52441 = 823^2 + 229^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 729770.

It is not an unprimeable number, because it can be changed into a prime (729779) by changing a digit.

729770 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36479 + ... + 36498.

2⁷²⁹⁷⁷⁰ is an apocalyptic number.

729770 is a deficient number, since it is larger than the sum of its proper divisors (583834).

729770 is a wasteful number, since it uses less digits than its factorization.

729770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72984.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 729770 is about 854.2657666090. The cubic root of 729770 is about 90.0316760929.

The spelling of 729770 in words is "seven hundred twenty-nine thousand, seven hundred seventy".