202128 has 20 divisors (see below), whose sum is σ = 522288. Its totient is φ = 67360.

The previous prime is 202127. The next prime is 202129. The reversal of 202128 is 821202.

It is an interprime number because it is at equal distance from previous prime (202127) and next prime (202129).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (202121) 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, 2058 + ... + 2153.

2²⁰²¹²⁸ is an apocalyptic number.

It is an amenable number.

202128 is an abundant number, since it is smaller than the sum of its proper divisors (320160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202128 is a wasteful number, since it uses less digits than its factorization.

202128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222 (or 4216 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 202128 is about 449.5864766649. The cubic root of 202128 is about 58.6870337916.

The spelling of 202128 in words is "two hundred two thousand, one hundred twenty-eight".