28180842 has 32 divisors (see below), whose sum is σ = 59937408. Its totient is φ = 8813376.

The previous prime is 28180811. The next prime is 28180879. The reversal of 28180842 is 24808182.

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 15 ways as a sum of consecutive naturals, for example, 5388 + ... + 9240.

It is an arithmetic number, because the mean of its divisors is an integer number (1873044).

Almost surely, 2^28180842 is an apocalyptic number.

28180842 is an abundant number, since it is smaller than the sum of its proper divisors (31756566).

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

28180842 is a wasteful number, since it uses less digits than its factorization.

28180842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934.

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 28180842 is about 5308.5630824169. The cubic root of 28180842 is about 304.3112362442.

The spelling of 28180842 in words is "twenty-eight million, one hundred eighty thousand, eight hundred forty-two".