28505682 has 20 divisors (see below), whose sum is σ = 63874206. Its totient is φ = 9501840.

The previous prime is 28505639. The next prime is 28505683. The reversal of 28505682 is 28650582.

It can be written as a sum of positive squares in only one way, i.e., 15610401 + 12895281 = 3951^2 + 3591^2 .

It is not an unprimeable number, because it can be changed into a prime (28505683) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 87819 + ... + 88142.

Almost surely, 2^28505682 is an apocalyptic number.

28505682 is an abundant number, since it is smaller than the sum of its proper divisors (35368524).

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

28505682 is a wasteful number, since it uses less digits than its factorization.

28505682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175975 (or 175966 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28505682 is about 5339.0712675521. The cubic root of 28505682 is about 305.4760352750.

The spelling of 28505682 in words is "twenty-eight million, five hundred five thousand, six hundred eighty-two".