28255242 has 16 divisors (see below), whose sum is σ = 59484960. Its totient is φ = 8922672.

The previous prime is 28255237. The next prime is 28255267. The reversal of 28255242 is 24255282.

It is an unprimeable number.

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, 123813 + ... + 124040.

It is an arithmetic number, because the mean of its divisors is an integer number (3717810).

Almost surely, 2^28255242 is an apocalyptic number.

28255242 is an abundant number, since it is smaller than the sum of its proper divisors (31229718).

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

28255242 is a wasteful number, since it uses less digits than its factorization.

28255242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247877.

The product of its digits is 12800, while the sum is 30.

The square root of 28255242 is about 5315.5660093728. The cubic root of 28255242 is about 304.5788040786.

The spelling of 28255242 in words is "twenty-eight million, two hundred fifty-five thousand, two hundred forty-two".