28686562 has 4 divisors (see below), whose sum is σ = 43029846. Its totient is φ = 14343280.

The previous prime is 28686551. The next prime is 28686571. The reversal of 28686562 is 26568682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28633201 + 53361 = 5351^2 + 231^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7171639 + ... + 7171642.

Almost surely, 2^28686562 is an apocalyptic number.

28686562 is a deficient number, since it is larger than the sum of its proper divisors (14343284).

28686562 is a wasteful number, since it uses less digits than its factorization.

28686562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14343283.

The product of its digits is 276480, while the sum is 43.

The square root of 28686562 is about 5355.9837565101. The cubic root of 28686562 is about 306.1207961434.

The spelling of 28686562 in words is "twenty-eight million, six hundred eighty-six thousand, five hundred sixty-two".