729878 has 8 divisors (see below), whose sum is σ = 1159272. Its totient is φ = 343456.

The previous prime is 729877. The next prime is 729907. The reversal of 729878 is 878927.

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 10700 + ... + 10767.

It is an arithmetic number, because the mean of its divisors is an integer number (144909).

2⁷²⁹⁸⁷⁸ is an apocalyptic number.

729878 is a deficient number, since it is larger than the sum of its proper divisors (429394).

729878 is a wasteful number, since it uses less digits than its factorization.

729878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21486.

The product of its digits is 56448, while the sum is 41.

The square root of 729878 is about 854.3289764488. The cubic root of 729878 is about 90.0361171914.

The spelling of 729878 in words is "seven hundred twenty-nine thousand, eight hundred seventy-eight".