28065586 has 4 divisors (see below), whose sum is σ = 42098382. Its totient is φ = 14032792.

The previous prime is 28065581. The next prime is 28065593. The reversal of 28065586 is 68556082.

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., 28037025 + 28561 = 5295^2 + 169^2 .

It is not an unprimeable number, because it can be changed into a prime (28065581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7016395 + ... + 7016398.

Almost surely, 2^28065586 is an apocalyptic number.

28065586 is a deficient number, since it is larger than the sum of its proper divisors (14032796).

28065586 is a wasteful number, since it uses less digits than its factorization.

28065586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14032795.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 28065586 is about 5297.6962917857. The cubic root of 28065586 is about 303.8958048386.

The spelling of 28065586 in words is "twenty-eight million, sixty-five thousand, five hundred eighty-six".