728030128 has 40 divisors (see below), whose sum is σ = 1615396608. Its totient is φ = 311368512.

The previous prime is 728030111. The next prime is 728030129. The reversal of 728030128 is 821030827.

It is a self number, because there is not a number n which added to its sum of digits gives 728030128.

It is not an unprimeable number, because it can be changed into a prime (728030129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49875 + ... + 62797.

Almost surely, 2^728030128 is an apocalyptic number.

It is an amenable number.

728030128 is an abundant number, since it is smaller than the sum of its proper divisors (887366480).

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

728030128 is a wasteful number, since it uses less digits than its factorization.

728030128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13441 (or 13435 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 728030128 is about 26982.0334296732. The cubic root of 728030128 is about 899.6006985890.

The spelling of 728030128 in words is "seven hundred twenty-eight million, thirty thousand, one hundred twenty-eight".