228643946 has 8 divisors (see below), whose sum is σ = 354792420. Its totient is φ = 110379808.

The previous prime is 228643903. The next prime is 228643963. The reversal of 228643946 is 649346822.

It can be written as a sum of positive squares in 2 ways, for example, as 226653025 + 1990921 = 15055^2 + 1411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228643897 and 228643906.

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 3 ways as a sum of consecutive naturals, for example, 1971011 + ... + 1971126.

Almost surely, 2^228643946 is an apocalyptic number.

228643946 is a deficient number, since it is larger than the sum of its proper divisors (126148474).

228643946 is a wasteful number, since it uses less digits than its factorization.

228643946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942168.

The product of its digits is 497664, while the sum is 44.

The square root of 228643946 is about 15120.9770186982. The cubic root of 228643946 is about 611.4860712461.

The spelling of 228643946 in words is "two hundred twenty-eight million, six hundred forty-three thousand, nine hundred forty-six".