1228420168 has 16 divisors (see below), whose sum is σ = 2305168380. Its totient is φ = 613708608.

The previous prime is 1228420163. The next prime is 1228420177. The reversal of 1228420168 is 8610248221.

It can be written as a sum of positive squares in 2 ways, for example, as 1213964964 + 14455204 = 34842^2 + 3802^2 .

It is a super-2 number, since 2×1228420168² = 3018032218298296448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1228420163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52171 + ... + 71962.

Almost surely, 2^1228420168 is an apocalyptic number.

It is an amenable number.

1228420168 is a deficient number, since it is larger than the sum of its proper divisors (1076748212).

1228420168 is a wasteful number, since it uses less digits than its factorization.

1228420168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125376 (or 125372 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 1228420168 is about 35048.8254867406. The cubic root of 1228420168 is about 1070.9823476228.

Adding to 1228420168 its reverse (8610248221), we get a palindrome (9838668389).

The spelling of 1228420168 in words is "one billion, two hundred twenty-eight million, four hundred twenty thousand, one hundred sixty-eight".