729896 has 8 divisors (see below), whose sum is σ = 1368570. Its totient is φ = 364944.

The previous prime is 729877. The next prime is 729907. The reversal of 729896 is 698927.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 7396 = 850^2 + 86^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45611 + ... + 45626.

2⁷²⁹⁸⁹⁶ is an apocalyptic number.

It is an amenable number.

729896 is a deficient number, since it is larger than the sum of its proper divisors (638674).

729896 is a wasteful number, since it uses less digits than its factorization.

729896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91243 (or 91239 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 729896 is about 854.3395109674. The cubic root of 729896 is about 90.0368573319.

The spelling of 729896 in words is "seven hundred twenty-nine thousand, eight hundred ninety-six".