1285228768 has 24 divisors (see below), whose sum is σ = 2532728520. Its totient is φ = 641996160.

The previous prime is 1285228759. The next prime is 1285228787. The reversal of 1285228768 is 8678225821.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15423 + ... + 52993.

It is an arithmetic number, because the mean of its divisors is an integer number (105530355).

Almost surely, 2^1285228768 is an apocalyptic number.

It is an amenable number.

1285228768 is a deficient number, since it is larger than the sum of its proper divisors (1247499752).

1285228768 is a wasteful number, since it uses less digits than its factorization.

1285228768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38650 (or 38642 counting only the distinct ones).

The product of its digits is 860160, while the sum is 49.

The square root of 1285228768 is about 35850.0874196982. The cubic root of 1285228768 is about 1087.2434818061.

The spelling of 1285228768 in words is "one billion, two hundred eighty-five million, two hundred twenty-eight thousand, seven hundred sixty-eight".