728439555 has 16 divisors (see below), whose sum is σ = 1216177920. Its totient is φ = 371609568.

The previous prime is 728439541. The next prime is 728439559. The reversal of 728439555 is 555934827.

728439555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 728439555 - 2⁷ = 728439427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728439559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055365 + ... + 1056054.

It is an arithmetic number, because the mean of its divisors is an integer number (76011120).

Almost surely, 2^728439555 is an apocalyptic number.

728439555 is a deficient number, since it is larger than the sum of its proper divisors (487738365).

728439555 is a wasteful number, since it uses less digits than its factorization.

728439555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111450.

The product of its digits is 1512000, while the sum is 48.

The square root of 728439555 is about 26989.6193933890. The cubic root of 728439555 is about 899.7693050691.

The spelling of 728439555 in words is "seven hundred twenty-eight million, four hundred thirty-nine thousand, five hundred fifty-five".