28026306 has 96 divisors (see below), whose sum is σ = 77021568. Its totient is φ = 7153920.

The previous prime is 28026281. The next prime is 28026331. The reversal of 28026306 is 60362082.

28026306 is a `hidden beast` number, since 28 + 0 + 2 + 630 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (28026281) and next prime (28026331).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28026306.

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 47 ways as a sum of consecutive naturals, for example, 101040 + ... + 101316.

It is an arithmetic number, because the mean of its divisors is an integer number (802308).

Almost surely, 2^28026306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28026306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38510784).

28026306 is an abundant number, since it is smaller than the sum of its proper divisors (48995262).

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

28026306 is a wasteful number, since it uses less digits than its factorization.

28026306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28026306 is about 5293.9877219351. The cubic root of 28026306 is about 303.7539632669.

Adding to 28026306 its reverse (60362082), we get a palindrome (88388388).

The spelling of 28026306 in words is "twenty-eight million, twenty-six thousand, three hundred six".