28785682 has 8 divisors (see below), whose sum is σ = 43237836. Its totient is φ = 14373072.

The previous prime is 28785629. The next prime is 28785683. The reversal of 28785682 is 28658782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25796241 + 2989441 = 5079^2 + 1729^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28785683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7993 + ... + 11020.

Almost surely, 2^28785682 is an apocalyptic number.

28785682 is a deficient number, since it is larger than the sum of its proper divisors (14452154).

28785682 is a wasteful number, since it uses less digits than its factorization.

28785682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19772.

The product of its digits is 430080, while the sum is 46.

The square root of 28785682 is about 5365.2289792701. The cubic root of 28785682 is about 306.4729681555.

The spelling of 28785682 in words is "twenty-eight million, seven hundred eighty-five thousand, six hundred eighty-two".