728458929 has 24 divisors (see below), whose sum is σ = 1151010432. Its totient is φ = 440284320.

The previous prime is 728458903. The next prime is 728458933. The reversal of 728458929 is 929854827.

It is not a de Polignac number, because 728458929 - 2⁸ = 728458673 is a prime.

It is a super-2 number, since 2×728458929² = 1061304822479654082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728458979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27064 + ... + 46790.

It is an arithmetic number, because the mean of its divisors is an integer number (47958768).

Almost surely, 2^728458929 is an apocalyptic number.

It is an amenable number.

728458929 is a deficient number, since it is larger than the sum of its proper divisors (422551503).

728458929 is a wasteful number, since it uses less digits than its factorization.

728458929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20117 (or 20114 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 728458929 is about 26989.9783067716. The cubic root of 728458929 is about 899.7772819268. Note that the first 3 decimals are identical.

The spelling of 728458929 in words is "seven hundred twenty-eight million, four hundred fifty-eight thousand, nine hundred twenty-nine".