729700 has 18 divisors (see below), whose sum is σ = 1583666. Its totient is φ = 291840.

The previous prime is 729689. The next prime is 729713. The reversal of 729700 is 7927.

It can be written as a sum of positive squares in 3 ways, for example, as 20736 + 708964 = 144^2 + 842^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

729700 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 5 ways as a sum of consecutive naturals, for example, 3549 + ... + 3748.

2⁷²⁹⁷⁰⁰ is an apocalyptic number.

It is an amenable number.

729700 is an abundant number, since it is smaller than the sum of its proper divisors (853966).

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

729700 is a wasteful number, since it uses less digits than its factorization.

729700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7311 (or 7304 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 729700 is about 854.2247947701. The cubic root of 729700 is about 90.0287973691.

The spelling of 729700 in words is "seven hundred twenty-nine thousand, seven hundred".