729719917928 has 16 divisors (see below), whose sum is σ = 1405203896580. Its totient is φ = 354998878848.

The previous prime is 729719917841. The next prime is 729719917937. The reversal of 729719917928 is 829719917927.

729719917928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 566469980164 + 163249937764 = 752642^2 + 404042^2 .

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

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, 1232634701 + ... + 1232635292.

Almost surely, 2^729719917928 is an apocalyptic number.

It is an amenable number.

729719917928 is a deficient number, since it is larger than the sum of its proper divisors (675483978652).

729719917928 is a wasteful number, since it uses less digits than its factorization.

729719917928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465270036 (or 2465270032 counting only the distinct ones).

The product of its digits is 72013536, while the sum is 71.

Subtracting 729719917928 from its reverse (829719917927), we obtain a palindrome (99999999999).

The spelling of 729719917928 in words is "seven hundred twenty-nine billion, seven hundred nineteen million, nine hundred seventeen thousand, nine hundred twenty-eight".