729969928 has 16 divisors (see below), whose sum is σ = 1371318480. Its totient is φ = 364285008.

The previous prime is 729969871. The next prime is 729969931. The reversal of 729969928 is 829969927.

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, 83050 + ... + 91417.

It is an arithmetic number, because the mean of its divisors is an integer number (85707405).

Almost surely, 2^729969928 is an apocalyptic number.

It is an amenable number.

729969928 is a deficient number, since it is larger than the sum of its proper divisors (641348552).

729969928 is a wasteful number, since it uses less digits than its factorization.

729969928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174996 (or 174992 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 61.

The square root of 729969928 is about 27017.9556591538. The cubic root of 729969928 is about 900.3989704352.

Subtracting 729969928 from its reverse (829969927), we obtain a palindrome (99999999).

The spelling of 729969928 in words is "seven hundred twenty-nine million, nine hundred sixty-nine thousand, nine hundred twenty-eight".