890128 has 10 divisors (see below), whose sum is σ = 1724654. Its totient is φ = 445056.

The previous prime is 890119. The next prime is 890129. The reversal of 890128 is 821098.

It can be written as a sum of positive squares in only one way, i.e., 589824 + 300304 = 768^2 + 548^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 890096 and 890105.

It is not an unprimeable number, because it can be changed into a prime (890129) by changing a digit.

890128 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 as a sum of consecutive naturals, namely, 27801 + ... + 27832.

2⁸⁹⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

890128 is a deficient number, since it is larger than the sum of its proper divisors (834526).

890128 is a wasteful number, since it uses less digits than its factorization.

890128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55641 (or 55635 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 890128 is about 943.4659506310. The cubic root of 890128 is about 96.1946282963.

The spelling of 890128 in words is "eight hundred ninety thousand, one hundred twenty-eight".