28663546 has 8 divisors (see below), whose sum is σ = 43253280. Its totient is φ = 14245788.

The previous prime is 28663541. The next prime is 28663549. The reversal of 28663546 is 64536682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28663499 and 28663508.

It is not an unprimeable number, because it can be changed into a prime (28663541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42576 + ... + 43243.

It is an arithmetic number, because the mean of its divisors is an integer number (5406660).

Almost surely, 2^28663546 is an apocalyptic number.

28663546 is a deficient number, since it is larger than the sum of its proper divisors (14589734).

28663546 is a wasteful number, since it uses less digits than its factorization.

28663546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85988.

The product of its digits is 207360, while the sum is 40.

The square root of 28663546 is about 5353.8347004740. The cubic root of 28663546 is about 306.0389045897.

The spelling of 28663546 in words is "twenty-eight million, six hundred sixty-three thousand, five hundred forty-six".