729870 has 16 divisors (see below), whose sum is σ = 1751760. Its totient is φ = 194624.

The previous prime is 729851. The next prime is 729871. The reversal of 729870 is 78927.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 729870.

It is not an unprimeable number, because it can be changed into a prime (729871) 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, 12135 + ... + 12194.

It is an arithmetic number, because the mean of its divisors is an integer number (109485).

2⁷²⁹⁸⁷⁰ is an apocalyptic number.

729870 is an abundant number, since it is smaller than the sum of its proper divisors (1021890).

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

729870 is a wasteful number, since it uses less digits than its factorization.

729870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24339.

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

The square root of 729870 is about 854.3242943988. The cubic root of 729870 is about 90.0357882362.

The spelling of 729870 in words is "seven hundred twenty-nine thousand, eight hundred seventy".