28280612 has 6 divisors (see below), whose sum is σ = 49491078. Its totient is φ = 14140304.

The previous prime is 28280599. The next prime is 28280621. The reversal of 28280612 is 21608282.

It can be written as a sum of positive squares in only one way, i.e., 24344356 + 3936256 = 4934^2 + 1984^2 .

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, 3535073 + ... + 3535080.

It is an arithmetic number, because the mean of its divisors is an integer number (8248513).

Almost surely, 2^28280612 is an apocalyptic number.

It is an amenable number.

28280612 is a deficient number, since it is larger than the sum of its proper divisors (21210466).

28280612 is a wasteful number, since it uses less digits than its factorization.

28280612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070157 (or 7070155 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28280612 is about 5317.9518613842. The cubic root of 28280612 is about 304.6699358729.

Adding to 28280612 its reverse (21608282), we get a palindrome (49888894).

The spelling of 28280612 in words is "twenty-eight million, two hundred eighty thousand, six hundred twelve".