28427968 has 14 divisors (see below), whose sum is σ = 56411876. Its totient is φ = 14213952.

The previous prime is 28427957. The next prime is 28427969. The reversal of 28427968 is 86972482.

It is not an unprimeable number, because it can be changed into a prime (28427969) 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 as a sum of consecutive naturals, namely, 222030 + ... + 222157.

Almost surely, 2^28427968 is an apocalyptic number.

It is an amenable number.

28427968 is a deficient number, since it is larger than the sum of its proper divisors (27983908).

28427968 is an equidigital number, since it uses as much as digits as its factorization.

28427968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444199 (or 444189 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 28427968 is about 5331.7884429148. The cubic root of 28427968 is about 305.1981798991.

The spelling of 28427968 in words is "twenty-eight million, four hundred twenty-seven thousand, nine hundred sixty-eight".