728873820057 has 16 divisors (see below), whose sum is σ = 1023001368320. Its totient is φ = 460332104400.

The previous prime is 728873820007. The next prime is 728873820113. The reversal of 728873820057 is 750028378827.

It is not a de Polignac number, because 728873820057 - 2⁸ = 728873819801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 728873819979 and 728873820006.

It is not an unprimeable number, because it can be changed into a prime (728873820007) 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, 3747582 + ... + 3937272.

It is an arithmetic number, because the mean of its divisors is an integer number (63937585520).

Almost surely, 2^728873820057 is an apocalyptic number.

It is an amenable number.

728873820057 is a deficient number, since it is larger than the sum of its proper divisors (294127548263).

728873820057 is a wasteful number, since it uses less digits than its factorization.

728873820057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257124.

The product of its (nonzero) digits is 10536960, while the sum is 57.

The spelling of 728873820057 in words is "seven hundred twenty-eight billion, eight hundred seventy-three million, eight hundred twenty thousand, fifty-seven".