28141686 has 12 divisors (see below), whose sum is σ = 60973692. Its totient is φ = 9380556.

The previous prime is 28141669. The next prime is 28141693. The reversal of 28141686 is 68614182.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28141686.

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, 781696 + ... + 781731.

It is an arithmetic number, because the mean of its divisors is an integer number (5081141).

Almost surely, 2^28141686 is an apocalyptic number.

28141686 is an abundant number, since it is smaller than the sum of its proper divisors (32832006).

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

28141686 is a wasteful number, since it uses less digits than its factorization.

28141686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563435 (or 1563432 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 28141686 is about 5304.8737968023. The cubic root of 28141686 is about 304.1702287025.

The spelling of 28141686 in words is "twenty-eight million, one hundred forty-one thousand, six hundred eighty-six".