28148884 has 6 divisors (see below), whose sum is σ = 49260554. Its totient is φ = 14074440.

The previous prime is 28148881. The next prime is 28148903. The reversal of 28148884 is 48884182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27857284 + 291600 = 5278^2 + 540^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28148884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28148881) 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, 3518607 + ... + 3518614.

Almost surely, 2^28148884 is an apocalyptic number.

It is an amenable number.

28148884 is a deficient number, since it is larger than the sum of its proper divisors (21111670).

28148884 is a wasteful number, since it uses less digits than its factorization.

28148884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037225 (or 7037223 counting only the distinct ones).

The product of its digits is 131072, while the sum is 43.

The square root of 28148884 is about 5305.5521861537. The cubic root of 28148884 is about 304.1961597556.

The spelling of 28148884 in words is "twenty-eight million, one hundred forty-eight thousand, eight hundred eighty-four".