28195686 has 12 divisors (see below), whose sum is σ = 61090692. Its totient is φ = 9398556.

The previous prime is 28195679. The next prime is 28195697. The reversal of 28195686 is 68659182.

28195686 is a `hidden beast` number, since 2 + 81 + 9 + 568 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 783196 + ... + 783231.

It is an arithmetic number, because the mean of its divisors is an integer number (5090891).

Almost surely, 2^28195686 is an apocalyptic number.

28195686 is an abundant number, since it is smaller than the sum of its proper divisors (32895006).

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

28195686 is a wasteful number, since it uses less digits than its factorization.

28195686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566435 (or 1566432 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 28195686 is about 5309.9610168061. The cubic root of 28195686 is about 304.3646579162.

The spelling of 28195686 in words is "twenty-eight million, one hundred ninety-five thousand, six hundred eighty-six".