28308842 has 8 divisors (see below), whose sum is σ = 44961156. Its totient is φ = 13321792.

The previous prime is 28308821. The next prime is 28308851. The reversal of 28308842 is 24880382.

It can be written as a sum of positive squares in 2 ways, for example, as 28079401 + 229441 = 5299^2 + 479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 416273 + ... + 416340.

Almost surely, 2^28308842 is an apocalyptic number.

28308842 is a deficient number, since it is larger than the sum of its proper divisors (16652314).

28308842 is a wasteful number, since it uses less digits than its factorization.

28308842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832632.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 28308842 is about 5320.6054166796. The cubic root of 28308842 is about 304.7712770563.

The spelling of 28308842 in words is "twenty-eight million, three hundred eight thousand, eight hundred forty-two".