28688086 has 8 divisors (see below), whose sum is σ = 49179600. Its totient is φ = 12294888.

The previous prime is 28688063. The next prime is 28688087. The reversal of 28688086 is 68088682.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28688087) 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, 1024561 + ... + 1024588.

It is an arithmetic number, because the mean of its divisors is an integer number (6147450).

Almost surely, 2^28688086 is an apocalyptic number.

28688086 is a deficient number, since it is larger than the sum of its proper divisors (20491514).

28688086 is a wasteful number, since it uses less digits than its factorization.

28688086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049158.

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 28688086 is about 5356.1260254031. The cubic root of 28688086 is about 306.1262170304.

The spelling of 28688086 in words is "twenty-eight million, six hundred eighty-eight thousand, eighty-six".