28294866 has 64 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 9074448.

The previous prime is 28294859. The next prime is 28294901. The reversal of 28294866 is 66849282.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 264385 + ... + 264491.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^28294866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28294866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32659200).

28294866 is an abundant number, since it is smaller than the sum of its proper divisors (37023534).

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

28294866 is a wasteful number, since it uses less digits than its factorization.

28294866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 254 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28294866 is about 5319.2918701647. The cubic root of 28294866 is about 304.7211138773.

The spelling of 28294866 in words is "twenty-eight million, two hundred ninety-four thousand, eight hundred sixty-six".