729117904 has 20 divisors (see below), whose sum is σ = 1428541380. Its totient is φ = 360462080.

The previous prime is 729117877. The next prime is 729117911. The reversal of 729117904 is 409711927.

It can be written as a sum of positive squares in 2 ways, for example, as 438483600 + 290634304 = 20940^2 + 17048^2 .

It is a super-2 number, since 2×729117904² = 1063225835866706432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254587 + ... + 257434.

It is an arithmetic number, because the mean of its divisors is an integer number (71427069).

Almost surely, 2^729117904 is an apocalyptic number.

It is an amenable number.

729117904 is a deficient number, since it is larger than the sum of its proper divisors (699423476).

729117904 is a wasteful number, since it uses less digits than its factorization.

729117904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512118 (or 512112 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 729117904 is about 27002.1833191318. The cubic root of 729117904 is about 900.0485175491.

The spelling of 729117904 in words is "seven hundred twenty-nine million, one hundred seventeen thousand, nine hundred four".