993128 has 16 divisors (see below), whose sum is σ = 1906080. Its totient is φ = 484848.

The previous prime is 993121. The next prime is 993137. The reversal of 993128 is 821399.

It is a junction number, because it is equal to n+sod(n) for n = 993094 and 993103.

It is not an unprimeable number, because it can be changed into a prime (993121) by changing a digit.

993128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100 + ... + 1787.

It is an arithmetic number, because the mean of its divisors is an integer number (119130).

2⁹⁹³¹²⁸ is an apocalyptic number.

It is an amenable number.

993128 is a deficient number, since it is larger than the sum of its proper divisors (912952).

993128 is a wasteful number, since it uses less digits than its factorization.

993128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936 (or 2932 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 993128 is about 996.5580765816. The cubic root of 993128 is about 99.7704066055.

The spelling of 993128 in words is "nine hundred ninety-three thousand, one hundred twenty-eight".