899728 has 20 divisors (see below), whose sum is σ = 1777788. Its totient is φ = 440960.

The previous prime is 899719. The next prime is 899749. The reversal of 899728 is 827998.

899728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 620944 + 278784 = 788^2 + 528^2 .

It is an Ulam number.

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

899728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318 + ... + 1378.

2⁸⁹⁹⁷²⁸ is an apocalyptic number.

It is an amenable number.

899728 is a deficient number, since it is larger than the sum of its proper divisors (878060).

899728 is a wasteful number, since it uses less digits than its factorization.

899728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1116 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 899728 is about 948.5399306302. The cubic root of 899728 is about 96.5392110690.

It can be divided in two parts, 8997 and 28, that added together give a square (9025 = 95²).

The spelling of 899728 in words is "eight hundred ninety-nine thousand, seven hundred twenty-eight".