1428226668 has 216 divisors, whose sum is σ = 4250675520. Its totient is φ = 415821600.

The previous prime is 1428226663. The next prime is 1428226693. The reversal of 1428226668 is 8666228241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428226663) 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 71 ways as a sum of consecutive naturals, for example, 10274943 + ... + 10275081.

Almost surely, 2^1428226668 is an apocalyptic number.

1428226668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428226668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2125337760).

1428226668 is an abundant number, since it is smaller than the sum of its proper divisors (2822448852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1428226668 is a wasteful number, since it uses less digits than its factorization.

1428226668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 186 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 1428226668 is about 37791.8862720558. The cubic root of 1428226668 is about 1126.1572731197.

The spelling of 1428226668 in words is "one billion, four hundred twenty-eight million, two hundred twenty-six thousand, six hundred sixty-eight".