28000230 has 32 divisors (see below), whose sum is σ = 67873248. Its totient is φ = 7392000.

The previous prime is 28000187. The next prime is 28000237. The reversal of 28000230 is 3200082.

It is a super-3 number, since 3×28000230³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000237) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1591 + ... + 7650.

It is an arithmetic number, because the mean of its divisors is an integer number (2121039).

Almost surely, 2^28000230 is an apocalyptic number.

28000230 is an abundant number, since it is smaller than the sum of its proper divisors (39873018).

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

28000230 is a wasteful number, since it uses less digits than its factorization.

28000230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9352.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 28000230 is about 5291.5243550417. The cubic root of 28000230 is about 303.6597286323.

The spelling of 28000230 in words is "twenty-eight million, two hundred thirty", and thus it is an aban number.