228705506 has 16 divisors (see below), whose sum is σ = 346943040. Its totient is φ = 113065200.

The previous prime is 228705497. The next prime is 228705517. The reversal of 228705506 is 605507822.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67505 + ... + 70811.

It is an arithmetic number, because the mean of its divisors is an integer number (21683940).

Almost surely, 2^228705506 is an apocalyptic number.

228705506 is a deficient number, since it is larger than the sum of its proper divisors (118237534).

228705506 is a wasteful number, since it uses less digits than its factorization.

228705506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 228705506 is about 15123.0124644530. The cubic root of 228705506 is about 611.5409450726.

The spelling of 228705506 in words is "two hundred twenty-eight million, seven hundred five thousand, five hundred six".