728655578 has 48 divisors (see below), whose sum is σ = 1319145984. Its totient is φ = 300736800.

The previous prime is 728655563. The next prime is 728655583. The reversal of 728655578 is 875556827.

Its product of digits (4704000) is a multiple of the sum of its prime divisors (2100).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 372503 + ... + 374453.

It is an arithmetic number, because the mean of its divisors is an integer number (27482208).

Almost surely, 2^728655578 is an apocalyptic number.

728655578 is a deficient number, since it is larger than the sum of its proper divisors (590490406).

728655578 is a wasteful number, since it uses less digits than its factorization.

728655578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107 (or 2100 counting only the distinct ones).

The product of its digits is 4704000, while the sum is 53.

The square root of 728655578 is about 26993.6210612804. The cubic root of 728655578 is about 899.8582402239.

The spelling of 728655578 in words is "seven hundred twenty-eight million, six hundred fifty-five thousand, five hundred seventy-eight".