228782146 has 8 divisors (see below), whose sum is σ = 347874444. Its totient is φ = 112824000.

The previous prime is 228782143. The next prime is 228782237. The reversal of 228782146 is 641287822.

It can be written as a sum of positive squares in 2 ways, for example, as 223831521 + 4950625 = 14961^2 + 2225^2 .

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

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 228782099 and 228782108.

It is not an unprimeable number, because it can be changed into a prime (228782143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783355 + ... + 783646.

Almost surely, 2^228782146 is an apocalyptic number.

228782146 is a deficient number, since it is larger than the sum of its proper divisors (119092298).

228782146 is a wasteful number, since it uses less digits than its factorization.

228782146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567076.

The product of its digits is 86016, while the sum is 40.

The square root of 228782146 is about 15125.5461389002. The cubic root of 228782146 is about 611.6092472669.

The spelling of 228782146 in words is "two hundred twenty-eight million, seven hundred eighty-two thousand, one hundred forty-six".