729704 has 16 divisors (see below), whose sum is σ = 1394820. Its totient is φ = 357760.

The previous prime is 729689. The next prime is 729713. The reversal of 729704 is 407927.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 40804 = 830^2 + 202^2 .

It is an Ulam number.

It is an unprimeable number.

729704 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, 437 + ... + 1284.

2⁷²⁹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

729704 is a deficient number, since it is larger than the sum of its proper divisors (665116).

729704 is a wasteful number, since it uses less digits than its factorization.

729704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 729704 is about 854.2271360710. The cubic root of 729704 is about 90.0289618725.

The spelling of 729704 in words is "seven hundred twenty-nine thousand, seven hundred four".