729780 has 24 divisors (see below), whose sum is σ = 2043552. Its totient is φ = 194592.

The previous prime is 729779. The next prime is 729787. The reversal of 729780 is 87927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6022 + ... + 6141.

It is an arithmetic number, because the mean of its divisors is an integer number (85148).

2⁷²⁹⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

729780 is an abundant number, since it is smaller than the sum of its proper divisors (1313772).

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

729780 is a wasteful number, since it uses less digits than its factorization.

729780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12175 (or 12173 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 729780 is about 854.2716195684. The cubic root of 729780 is about 90.0320873241.

The spelling of 729780 in words is "seven hundred twenty-nine thousand, seven hundred eighty".