28356806 has 4 divisors (see below), whose sum is σ = 42535212. Its totient is φ = 14178402.

The previous prime is 28356793. The next prime is 28356817. The reversal of 28356806 is 60865382.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28356806.

It is a congruent number.

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, 7089200 + ... + 7089203.

It is an arithmetic number, because the mean of its divisors is an integer number (10633803).

Almost surely, 2^28356806 is an apocalyptic number.

28356806 is a deficient number, since it is larger than the sum of its proper divisors (14178406).

28356806 is a wasteful number, since it uses less digits than its factorization.

28356806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14178405.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 28356806 is about 5325.1108908642. The cubic root of 28356806 is about 304.9433057750.

The spelling of 28356806 in words is "twenty-eight million, three hundred fifty-six thousand, eight hundred six".