729746 has 4 divisors (see below), whose sum is σ = 1094622. Its totient is φ = 364872.

The previous prime is 729737. The next prime is 729749. The reversal of 729746 is 647927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 474721 + 255025 = 689^2 + 505^2 .

It is not an unprimeable number, because it can be changed into a prime (729749) by changing a digit.

729746 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 as a sum of consecutive naturals, namely, 182435 + ... + 182438.

2⁷²⁹⁷⁴⁶ is an apocalyptic number.

729746 is a deficient number, since it is larger than the sum of its proper divisors (364876).

729746 is a wasteful number, since it uses less digits than its factorization.

729746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364875.

The product of its digits is 21168, while the sum is 35.

The square root of 729746 is about 854.2517193427. The cubic root of 729746 is about 90.0306891226.

The spelling of 729746 in words is "seven hundred twenty-nine thousand, seven hundred forty-six".