1228266946 has 4 divisors (see below), whose sum is σ = 1842400422. Its totient is φ = 614133472.

The previous prime is 1228266943. The next prime is 1228266973. The reversal of 1228266946 is 6496628221.

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., 1228152025 + 114921 = 35045^2 + 339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1228266896 and 1228266905.

It is not an unprimeable number, because it can be changed into a prime (1228266943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307066735 + ... + 307066738.

Almost surely, 2^1228266946 is an apocalyptic number.

1228266946 is a deficient number, since it is larger than the sum of its proper divisors (614133476).

1228266946 is an equidigital number, since it uses as much as digits as its factorization.

1228266946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614133475.

The product of its digits is 497664, while the sum is 46.

The square root of 1228266946 is about 35046.6395821340. The cubic root of 1228266946 is about 1070.9378175603.

The spelling of 1228266946 in words is "one billion, two hundred twenty-eight million, two hundred sixty-six thousand, nine hundred forty-six".