728856804578 has 64 divisors (see below), whose sum is σ = 1337206413312. Its totient is φ = 291161122560.

The previous prime is 728856804541. The next prime is 728856804583. The reversal of 728856804578 is 875408658827.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5934533 + ... + 6056103.

It is an arithmetic number, because the mean of its divisors is an integer number (20893850208).

Almost surely, 2^728856804578 is an apocalyptic number.

728856804578 is a deficient number, since it is larger than the sum of its proper divisors (608349608734).

728856804578 is a wasteful number, since it uses less digits than its factorization.

728856804578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122079.

The product of its (nonzero) digits is 240844800, while the sum is 68.

The spelling of 728856804578 in words is "seven hundred twenty-eight billion, eight hundred fifty-six million, eight hundred four thousand, five hundred seventy-eight".