28801686 has 8 divisors (see below), whose sum is σ = 57603384. Its totient is φ = 9600560.

The previous prime is 28801679. The next prime is 28801691. The reversal of 28801686 is 68610882.

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

28801686 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400135 + ... + 2400146.

It is an arithmetic number, because the mean of its divisors is an integer number (7200423).

Almost surely, 2^28801686 is an apocalyptic number.

28801686 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.

28801686 is a wasteful number, since it uses less digits than its factorization.

28801686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800286.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 28801686 is about 5366.7202274760. The cubic root of 28801686 is about 306.5297543116.

The spelling of 28801686 in words is "twenty-eight million, eight hundred one thousand, six hundred eighty-six".