28539686 has 8 divisors (see below), whose sum is σ = 48925200. Its totient is φ = 12231288.

The previous prime is 28539677. The next prime is 28539689. The reversal of 28539686 is 68693582.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28539686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019261 + ... + 1019288.

It is an arithmetic number, because the mean of its divisors is an integer number (6115650).

Almost surely, 2^28539686 is an apocalyptic number.

28539686 is a deficient number, since it is larger than the sum of its proper divisors (20385514).

28539686 is a wasteful number, since it uses less digits than its factorization.

28539686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038558.

The product of its digits is 622080, while the sum is 47.

The square root of 28539686 is about 5342.2547674180. The cubic root of 28539686 is about 305.5974529337.

The spelling of 28539686 in words is "twenty-eight million, five hundred thirty-nine thousand, six hundred eighty-six".