28862986 has 4 divisors (see below), whose sum is σ = 43294482. Its totient is φ = 14431492.

The previous prime is 28862971. The next prime is 28862987. The reversal of 28862986 is 68926882.

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., 27720225 + 1142761 = 5265^2 + 1069^2 .

It is not an unprimeable number, because it can be changed into a prime (28862987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7215745 + ... + 7215748.

Almost surely, 2^28862986 is an apocalyptic number.

28862986 is a deficient number, since it is larger than the sum of its proper divisors (14431496).

28862986 is a wasteful number, since it uses less digits than its factorization.

28862986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14431495.

The product of its digits is 663552, while the sum is 49.

The square root of 28862986 is about 5372.4283150173. The cubic root of 28862986 is about 306.7470675033.

The spelling of 28862986 in words is "twenty-eight million, eight hundred sixty-two thousand, nine hundred eighty-six".