201928 has 16 divisors (see below), whose sum is σ = 388080. Its totient is φ = 98448.

The previous prime is 201923. The next prime is 201937. The reversal of 201928 is 829102.

It is a junction number, because it is equal to n+sod(n) for n = 201899 and 201908.

It is not an unprimeable number, because it can be changed into a prime (201923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51 + ... + 637.

It is an arithmetic number, because the mean of its divisors is an integer number (24255).

2²⁰¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

201928 is a deficient number, since it is larger than the sum of its proper divisors (186152).

201928 is a wasteful number, since it uses less digits than its factorization.

201928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 201928 is about 449.3639949974. The cubic root of 201928 is about 58.6676710113.

The spelling of 201928 in words is "two hundred one thousand, nine hundred twenty-eight".