28948868 has 12 divisors (see below), whose sum is σ = 54557580. Its totient is φ = 13360992.

The previous prime is 28948867. The next prime is 28948879. The reversal of 28948868 is 86884982.

It can be written as a sum of positive squares in 2 ways, for example, as 10355524 + 18593344 = 3218^2 + 4312^2 .

It is not an unprimeable number, because it can be changed into a prime (28948861) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 278303 + ... + 278406.

It is an arithmetic number, because the mean of its divisors is an integer number (4546465).

Almost surely, 2^28948868 is an apocalyptic number.

It is an amenable number.

28948868 is a deficient number, since it is larger than the sum of its proper divisors (25608712).

28948868 is a wasteful number, since it uses less digits than its factorization.

28948868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556726 (or 556724 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 53.

The square root of 28948868 is about 5380.4152256122. The cubic root of 28948868 is about 307.0510088649.

The spelling of 28948868 in words is "twenty-eight million, nine hundred forty-eight thousand, eight hundred sixty-eight".