551728 has 10 divisors (see below), whose sum is σ = 1069004. Its totient is φ = 275856.

The previous prime is 551723. The next prime is 551729. The reversal of 551728 is 827155.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 551696 and 551705.

It is not an unprimeable number, because it can be changed into a prime (551723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17226 + ... + 17257.

2⁵⁵¹⁷²⁸ is an apocalyptic number.

It is an amenable number.

551728 is a deficient number, since it is larger than the sum of its proper divisors (517276).

551728 is a wasteful number, since it uses less digits than its factorization.

551728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34491 (or 34485 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 551728 is about 742.7839524384. The cubic root of 551728 is about 82.0178426372.

The spelling of 551728 in words is "five hundred fifty-one thousand, seven hundred twenty-eight".