201230028 has 24 divisors (see below), whose sum is σ = 521707760. Its totient is φ = 67076640.

The previous prime is 201229997. The next prime is 201230063. The reversal of 201230028 is 820032102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 931513 + ... + 931728.

Almost surely, 2^201230028 is an apocalyptic number.

It is an amenable number.

201230028 is an abundant number, since it is smaller than the sum of its proper divisors (320477732).

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

201230028 is a wasteful number, since it uses less digits than its factorization.

201230028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863254 (or 1863246 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 201230028 is about 14185.5570211395. The cubic root of 201230028 is about 585.9999728205. Note that the first 4 decimals are identical.

The spelling of 201230028 in words is "two hundred one million, two hundred thirty thousand, twenty-eight".