28561746 has 8 divisors (see below), whose sum is σ = 57123504. Its totient is φ = 9520580.

The previous prime is 28561727. The next prime is 28561783. The reversal of 28561746 is 64716582.

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

28561746 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 2380140 + ... + 2380151.

It is an arithmetic number, because the mean of its divisors is an integer number (7140438).

Almost surely, 2^28561746 is an apocalyptic number.

28561746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28561746 is a wasteful number, since it uses less digits than its factorization.

28561746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760296.

The product of its digits is 80640, while the sum is 39.

The square root of 28561746 is about 5344.3190398778. The cubic root of 28561746 is about 305.6761707304.

The spelling of 28561746 in words is "twenty-eight million, five hundred sixty-one thousand, seven hundred forty-six".