203128 has 8 divisors (see below), whose sum is σ = 380880. Its totient is φ = 101560.

The previous prime is 203117. The next prime is 203141. The reversal of 203128 is 821302.

It is a happy number.

203128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

203128 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, 12688 + ... + 12703.

It is an arithmetic number, because the mean of its divisors is an integer number (47610).

2²⁰³¹²⁸ is an apocalyptic number.

It is an amenable number.

203128 is a deficient number, since it is larger than the sum of its proper divisors (177752).

203128 is a wasteful number, since it uses less digits than its factorization.

203128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25397 (or 25393 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 203128 is about 450.6972376219. The cubic root of 203128 is about 58.7836565866.

The spelling of 203128 in words is "two hundred three thousand, one hundred twenty-eight".