28864026 has 32 divisors (see below), whose sum is σ = 64944000. Its totient is φ = 9619884.

The previous prime is 28864009. The next prime is 28864027. The reversal of 28864026 is 62046882.

28864026 is a `hidden beast` number, since 2 + 8 + 8 + 640 + 2 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28864027) 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 15 ways as a sum of consecutive naturals, for example, 1075 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (2029500).

Almost surely, 2^28864026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28864026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32472000).

28864026 is an abundant number, since it is smaller than the sum of its proper divisors (36079974).

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

28864026 is an frugal number, since it uses more digits than its factorization.

28864026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6622 (or 6604 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 28864026 is about 5372.5251046412. The cubic root of 28864026 is about 306.7507517273.

The spelling of 28864026 in words is "twenty-eight million, eight hundred sixty-four thousand, twenty-six".