729720 has 48 divisors (see below), whose sum is σ = 2372760. Its totient is φ = 194496.

The previous prime is 729719. The next prime is 729737. The reversal of 729720 is 27927.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654 + ... + 1373.

2⁷²⁹⁷²⁰ is an apocalyptic number.

It is an amenable number.

729720 is an abundant number, since it is smaller than the sum of its proper divisors (1643040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

729720 is a wasteful number, since it uses less digits than its factorization.

729720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 729720 is about 854.2365012103. The cubic root of 729720 is about 90.0296198804.

The spelling of 729720 in words is "seven hundred twenty-nine thousand, seven hundred twenty".