729280 has 56 divisors (see below), whose sum is σ = 1810512. Its totient is φ = 279552.

The previous prime is 729271. The next prime is 729293. The reversal of 729280 is 82927.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13734 + ... + 13786.

2⁷²⁹²⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 729280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905256).

729280 is an abundant number, since it is smaller than the sum of its proper divisors (1081232).

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

729280 is a wasteful number, since it uses less digits than its factorization.

729280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 729280 is about 853.9789224565. The cubic root of 729280 is about 90.0115211588.

The spelling of 729280 in words is "seven hundred twenty-nine thousand, two hundred eighty".