28566450 has 144 divisors (see below), whose sum is σ = 87048000. Its totient is φ = 6652800.

The previous prime is 28566449. The next prime is 28566457. The reversal of 28566450 is 5466582.

28566450 is a `hidden beast` number, since 2 + 8 + 5 + 6 + 645 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (28566457) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 143451 + ... + 143649.

It is an arithmetic number, because the mean of its divisors is an integer number (604500).

Almost surely, 2^28566450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28566450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43524000).

28566450 is an abundant number, since it is smaller than the sum of its proper divisors (58481550).

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

28566450 is a wasteful number, since it uses less digits than its factorization.

28566450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 28566450 is about 5344.7591152455. The cubic root of 28566450 is about 305.6929510044.

The spelling of 28566450 in words is "twenty-eight million, five hundred sixty-six thousand, four hundred fifty".