40228 has 12 divisors (see below), whose sum is σ = 71820. Its totient is φ = 19712.

The previous prime is 40213. The next prime is 40231. The reversal of 40228 is 82204.

It can be written as a sum of positive squares in 2 ways, for example, as 3364 + 36864 = 58^2 + 192^2 .

40228 is an undulating number in base 15.

It is an unprimeable number.

40228 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300 + ... + 412.

It is an arithmetic number, because the mean of its divisors is an integer number (5985).

2⁴⁰²²⁸ is an apocalyptic number.

It is an amenable number.

40228 is a deficient number, since it is larger than the sum of its proper divisors (31592).

40228 is a wasteful number, since it uses less digits than its factorization.

40228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 40228 is about 200.5691900567. The cubic root of 40228 is about 34.2643749487.

The spelling of 40228 in words is "forty thousand, two hundred twenty-eight".