728077056 has 72 divisors (see below), whose sum is σ = 2214584064. Its totient is φ = 208020480.

The previous prime is 728077043. The next prime is 728077061. The reversal of 728077056 is 650770827.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 728076999 and 728077017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62340 + ... + 73091.

It is an arithmetic number, because the mean of its divisors is an integer number (30758112).

Almost surely, 2^728077056 is an apocalyptic number.

It is an amenable number.

728077056 is an abundant number, since it is smaller than the sum of its proper divisors (1486507008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728077056 is a wasteful number, since it uses less digits than its factorization.

728077056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135457 (or 135443 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 728077056 is about 26982.9030313641. The cubic root of 728077056 is about 899.6200272555.

The spelling of 728077056 in words is "seven hundred twenty-eight million, seventy-seven thousand, fifty-six".