1285227628 has 12 divisors (see below), whose sum is σ = 2249494632. Its totient is φ = 642514880.

The previous prime is 1285227623. The next prime is 1285227631. The reversal of 1285227628 is 8267225821.

It is not an unprimeable number, because it can be changed into a prime (1285227623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9876 + ... + 51652.

It is an arithmetic number, because the mean of its divisors is an integer number (187457886).

Almost surely, 2^1285227628 is an apocalyptic number.

It is an amenable number.

1285227628 is a deficient number, since it is larger than the sum of its proper divisors (964267004).

1285227628 is a wasteful number, since it uses less digits than its factorization.

1285227628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49472 (or 49470 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 1285227628 is about 35850.0715201518. The cubic root of 1285227628 is about 1087.2431603438.

The spelling of 1285227628 in words is "one billion, two hundred eighty-five million, two hundred twenty-seven thousand, six hundred twenty-eight".