28309448 has 32 divisors (see below), whose sum is σ = 55153920. Its totient is φ = 13608000.

The previous prime is 28309409. The next prime is 28309451. The reversal of 28309448 is 84490382.

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 7 ways as a sum of consecutive naturals, for example, 52058 + ... + 52598.

It is an arithmetic number, because the mean of its divisors is an integer number (1723560).

Almost surely, 2^28309448 is an apocalyptic number.

It is an amenable number.

28309448 is a deficient number, since it is larger than the sum of its proper divisors (26844472).

28309448 is a wasteful number, since it uses less digits than its factorization.

28309448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28309448 is about 5320.6623647813. The cubic root of 28309448 is about 304.7734517605.

The spelling of 28309448 in words is "twenty-eight million, three hundred nine thousand, four hundred forty-eight".