28586566 has 4 divisors (see below), whose sum is σ = 42879852. Its totient is φ = 14293282.

The previous prime is 28586563. The next prime is 28586567. The reversal of 28586566 is 66568582.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28586561) 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, 7146640 + ... + 7146643.

It is an arithmetic number, because the mean of its divisors is an integer number (10719963).

Almost surely, 2^28586566 is an apocalyptic number.

28586566 is a deficient number, since it is larger than the sum of its proper divisors (14293286).

28586566 is a wasteful number, since it uses less digits than its factorization.

28586566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14293285.

The product of its digits is 691200, while the sum is 46.

The square root of 28586566 is about 5346.6406275343. The cubic root of 28586566 is about 305.7646887312.

The spelling of 28586566 in words is "twenty-eight million, five hundred eighty-six thousand, five hundred sixty-six".