729864865 has 8 divisors (see below), whose sum is σ = 913917888. Its totient is φ = 558505200.

The previous prime is 729864857. The next prime is 729864871. The reversal of 729864865 is 568468927.

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

It is not a de Polignac number, because 729864865 - 2³ = 729864857 is a prime.

It is a super-2 number, since 2×729864865² = 1065405442322936450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3173211 + ... + 3173440.

It is an arithmetic number, because the mean of its divisors is an integer number (114239736).

Almost surely, 2^729864865 is an apocalyptic number.

It is an amenable number.

729864865 is a deficient number, since it is larger than the sum of its proper divisors (184053023).

729864865 is a wasteful number, since it uses less digits than its factorization.

729864865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6346679.

The product of its digits is 5806080, while the sum is 55.

The square root of 729864865 is about 27016.0112710963. The cubic root of 729864865 is about 900.3557708675.

The spelling of 729864865 in words is "seven hundred twenty-nine million, eight hundred sixty-four thousand, eight hundred sixty-five".