28206120 has 32 divisors (see below), whose sum is σ = 84618720. Its totient is φ = 7521600.

The previous prime is 28206109. The next prime is 28206121. The reversal of 28206120 is 2160282.

It is not an unprimeable number, because it can be changed into a prime (28206121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117406 + ... + 117645.

It is an arithmetic number, because the mean of its divisors is an integer number (2644335).

Almost surely, 2^28206120 is an apocalyptic number.

28206120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28206120 is an abundant number, since it is smaller than the sum of its proper divisors (56412600).

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

28206120 is a wasteful number, since it uses less digits than its factorization.

28206120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235065 (or 235061 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28206120 is about 5310.9434190170. The cubic root of 28206120 is about 304.4021973373.

The spelling of 28206120 in words is "twenty-eight million, two hundred six thousand, one hundred twenty".