28281366 has 16 divisors (see below), whose sum is σ = 62847600. Its totient is φ = 9427104.

The previous prime is 28281343. The next prime is 28281371. The reversal of 28281366 is 66318282.

It is a self number, because there is not a number n which added to its sum of digits gives 28281366.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 261811 + ... + 261918.

It is an arithmetic number, because the mean of its divisors is an integer number (3927975).

Almost surely, 2^28281366 is an apocalyptic number.

28281366 is an abundant number, since it is smaller than the sum of its proper divisors (34566234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28281366 is a wasteful number, since it uses less digits than its factorization.

28281366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523740 (or 523734 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28281366 is about 5318.0227528660. The cubic root of 28281366 is about 304.6726434886.

The spelling of 28281366 in words is "twenty-eight million, two hundred eighty-one thousand, three hundred sixty-six".