729970 has 8 divisors (see below), whose sum is σ = 1313964. Its totient is φ = 291984.

The previous prime is 729947. The next prime is 729977. The reversal of 729970 is 79927.

729970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 710649 + 19321 = 843^2 + 139^2 .

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

It is not an unprimeable number, because it can be changed into a prime (729977) by changing a digit.

729970 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, 36489 + ... + 36508.

2⁷²⁹⁹⁷⁰ is an apocalyptic number.

729970 is a deficient number, since it is larger than the sum of its proper divisors (583994).

729970 is a wasteful number, since it uses less digits than its factorization.

729970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73004.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 729970 is about 854.3828181793. The cubic root of 729970 is about 90.0399000039.

The spelling of 729970 in words is "seven hundred twenty-nine thousand, nine hundred seventy".