28386706 has 4 divisors (see below), whose sum is σ = 42580062. Its totient is φ = 14193352.

The previous prime is 28386689. The next prime is 28386727. The reversal of 28386706 is 60768382.

It is a happy number.

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., 17986081 + 10400625 = 4241^2 + 3225^2 .

It is an unprimeable number.

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, 7096675 + ... + 7096678.

Almost surely, 2^28386706 is an apocalyptic number.

28386706 is a deficient number, since it is larger than the sum of its proper divisors (14193356).

28386706 is a wasteful number, since it uses less digits than its factorization.

28386706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14193355.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28386706 is about 5327.9176044680. The cubic root of 28386706 is about 305.0504476260.

It can be divided in two parts, 28386 and 706, that added together give a palindrome (29092).

The spelling of 28386706 in words is "twenty-eight million, three hundred eighty-six thousand, seven hundred six".