28301888 has 14 divisors (see below), whose sum is σ = 56161686. Its totient is φ = 14150912.

The previous prime is 28301857. The next prime is 28301893. The reversal of 28301888 is 88810382.

It can be written as a sum of positive squares in only one way, i.e., 27541504 + 760384 = 5248^2 + 872^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221045 + ... + 221172.

It is an arithmetic number, because the mean of its divisors is an integer number (4011549).

Almost surely, 2^28301888 is an apocalyptic number.

It is an amenable number.

28301888 is a deficient number, since it is larger than the sum of its proper divisors (27859798).

28301888 is an equidigital number, since it uses as much as digits as its factorization.

28301888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442229 (or 442219 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 28301888 is about 5319.9518794816. The cubic root of 28301888 is about 304.7463195651.

The spelling of 28301888 in words is "twenty-eight million, three hundred one thousand, eight hundred eighty-eight".