555800728 has 72 divisors (see below), whose sum is σ = 1232892900. Its totient is φ = 234208128.

The previous prime is 555800723. The next prime is 555800731. The reversal of 555800728 is 827008555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555800723) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3104943 + ... + 3105121.

Almost surely, 2^555800728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555800728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616446450).

555800728 is an abundant number, since it is smaller than the sum of its proper divisors (677092172).

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

555800728 is a wasteful number, since it uses less digits than its factorization.

555800728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 555800728 is about 23575.4263588169. The cubic root of 555800728 is about 822.1916031073.

The spelling of 555800728 in words is "five hundred fifty-five million, eight hundred thousand, seven hundred twenty-eight".