228409946 has 4 divisors (see below), whose sum is σ = 342614922. Its totient is φ = 114204972.

The previous prime is 228409921. The next prime is 228409967. The reversal of 228409946 is 649904822.

It is a happy number.

228409946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 177928921 + 50481025 = 13339^2 + 7105^2 .

It is a super-2 number, since 2×228409946² = 104342206863445832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228409897 and 228409906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57102485 + ... + 57102488.

Almost surely, 2^228409946 is an apocalyptic number.

228409946 is a deficient number, since it is larger than the sum of its proper divisors (114204976).

228409946 is a wasteful number, since it uses less digits than its factorization.

228409946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114204975.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 228409946 is about 15113.2374427189. The cubic root of 228409946 is about 611.2773966027.

The spelling of 228409946 in words is "two hundred twenty-eight million, four hundred nine thousand, nine hundred forty-six".