729988 has 36 divisors (see below), whose sum is σ = 1560832. Its totient is φ = 292320.

The previous prime is 729979. The next prime is 729991. The reversal of 729988 is 889927.

It is an unprimeable number.

729988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23533 + ... + 23563.

2⁷²⁹⁹⁸⁸ 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 729988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780416).

729988 is an abundant number, since it is smaller than the sum of its proper divisors (830844).

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

729988 is a wasteful number, since it uses less digits than its factorization.

729988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 69 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 729988 is about 854.3933520341. The cubic root of 729988 is about 90.0406400822.

The spelling of 729988 in words is "seven hundred twenty-nine thousand, nine hundred eighty-eight".